Remove asserts that cause compilation failures on Linux.
Remove asserts that cause compilation failures on Linux.

The Linux assert() is apparently doing a positive test on the value,
whereas the Darwin assert() is negating it.

APInt has an operator!(), but APInt cannot be implicitly converted to a
bool, so directly testing the value caused issues only on the Linux
build.

JoeG says the asserts were testing pointer nullness before his recent
representation changes, and aren't meaningful with the new
representation, so they should just be removed.

Swift SVN r29011

gregomni/swift,rudkx/swift,amraboelela/swift,parkera/swift,manavgabhawala/swift,apple/swift,manavgabhawala/swift,sschiau/swift,tinysun212/swift-windows,natecook1000/swift,KrishMunot/swift,nathawes/swift,jmgc/swift,KrishMunot/swift,russbishop/swift,ahoppen/swift,johnno1962d/swift,jtbandes/swift,ken0nek/swift,tjw/swift,practicalswift/swift,cbrentharris/swift,danielmartin/swift,rudkx/swift,djwbrown/swift,devincoughlin/swift,sdulal/swift,deyton/swift,benlangmuir/swift,natecook1000/swift,OscarSwanros/swift,aschwaighofer/swift,sschiau/swift,shahmishal/swift,MukeshKumarS/Swift,MukeshKumarS/Swift,devincoughlin/swift,karwa/swift,ken0nek/swift,devincoughlin/swift,frootloops/swift,khizkhiz/swift,bitjammer/swift,gmilos/swift,hughbe/swift,jopamer/swift,manavgabhawala/swift,OscarSwanros/swift,djwbrown/swift,harlanhaskins/swift,CodaFi/swift,gmilos/swift,shajrawi/swift,djwbrown/swift,shahmishal/swift,modocache/swift,tardieu/swift,deyton/swift,tinysun212/swift-windows,alblue/swift,lorentey/swift,kusl/swift,kusl/swift,tinysun212/swift-windows,khizkhiz/swift,tjw/swift,airspeedswift/swift,manavgabhawala/swift,calebd/swift,swiftix/swift.old,swiftix/swift.old,aschwaighofer/swift,benlangmuir/swift,gregomni/swift,jopamer/swift,uasys/swift,tjw/swift,hughbe/swift,zisko/swift,practicalswift/swift,airspeedswift/swift,gottesmm/swift,kentya6/swift,calebd/swift,ken0nek/swift,huonw/swift,lorentey/swift,calebd/swift,IngmarStein/swift,mightydeveloper/swift,Ivacker/swift,LeoShimonaka/swift,Ivacker/swift,CodaFi/swift,dduan/swift,kstaring/swift,emilstahl/swift,xedin/swift,modocache/swift,benlangmuir/swift,hooman/swift,djwbrown/swift,xwu/swift,gmilos/swift,felix91gr/swift,Ivacker/swift,Jnosh/swift,karwa/swift,devincoughlin/swift,gregomni/swift,JGiola/swift,russbishop/swift,JGiola/swift,IngmarStein/swift,gmilos/swift,IngmarStein/swift,allevato/swift,jopamer/swift,SwiftAndroid/swift,khizkhiz/swift,allevato/swift,ben-ng/swift,alblue/swift,swiftix/swift,deyton/swift,emilstahl/swift,harlanhaskins/swift,roambotics/swift,tinysun212/swift-windows,codestergit/swift,tardieu/swift,hooman/swift,slavapestov/swift,milseman/swift,aschwaighofer/swift,amraboelela/swift,manavgabhawala/swift,CodaFi/swift,brentdax/swift,ben-ng/swift,uasys/swift,practicalswift/swift,stephentyrone/swift,slavapestov/swift,cbrentharris/swift,tardieu/swift,sdulal/swift,kperryua/swift,dreamsxin/swift,tjw/swift,xwu/swift,ken0nek/swift,jmgc/swift,dduan/swift,alblue/swift,atrick/swift,sschiau/swift,MukeshKumarS/Swift,sdulal/swift,codestergit/swift,lorentey/swift,rudkx/swift,tardieu/swift,emilstahl/swift,Jnosh/swift,rudkx/swift,austinzheng/swift,arvedviehweger/swift,JaSpa/swift,harlanhaskins/swift,gribozavr/swift,xedin/swift,return/swift,swiftix/swift.old,sschiau/swift,mightydeveloper/swift,therealbnut/swift,KrishMunot/swift,slavapestov/swift,glessard/swift,ken0nek/swift,slavapestov/swift,lorentey/swift,jtbandes/swift,danielmartin/swift,therealbnut/swift,jckarter/swift,nathawes/swift,shajrawi/swift,jopamer/swift,frootloops/swift,SwiftAndroid/swift,Ivacker/swift,Jnosh/swift,shajrawi/swift,cbrentharris/swift,uasys/swift,CodaFi/swift,arvedviehweger/swift,LeoShimonaka/swift,IngmarStein/swift,tinysun212/swift-windows,devincoughlin/swift,adrfer/swift,Ivacker/swift,practicalswift/swift,arvedviehweger/swift,parkera/swift,tjw/swift,jckarter/swift,bitjammer/swift,felix91gr/swift,tinysun212/swift-windows,brentdax/swift,cbrentharris/swift,IngmarStein/swift,swiftix/swift,austinzheng/swift,emilstahl/swift,jckarter/swift,shajrawi/swift,dduan/swift,johnno1962d/swift,shajrawi/swift,kentya6/swift,harlanhaskins/swift,kperryua/swift,slavapestov/swift,mightydeveloper/swift,CodaFi/swift,amraboelela/swift,zisko/swift,austinzheng/swift,manavgabhawala/swift,tardieu/swift,hooman/swift,shajrawi/swift,huonw/swift,tardieu/swift,khizkhiz/swift,jtbandes/swift,modocache/swift,airspeedswift/swift,djwbrown/swift,deyton/swift,kusl/swift,slavapestov/swift,brentdax/swift,LeoShimonaka/swift,mightydeveloper/swift,gregomni/swift,atrick/swift,sdulal/swift,felix91gr/swift,ahoppen/swift,OscarSwanros/swift,stephentyrone/swift,emilstahl/swift,gottesmm/swift,brentdax/swift,benlangmuir/swift,JaSpa/swift,KrishMunot/swift,jckarter/swift,apple/swift,Jnosh/swift,austinzheng/swift,frootloops/swift,hughbe/swift,SwiftAndroid/swift,aschwaighofer/swift,xedin/swift,ahoppen/swift,russbishop/swift,brentdax/swift,return/swift,gribozavr/swift,djwbrown/swift,Ivacker/swift,calebd/swift,jmgc/swift,cbrentharris/swift,emilstahl/swift,gmilos/swift,adrfer/swift,khizkhiz/swift,parkera/swift,swiftix/swift,harlanhaskins/swift,rudkx/swift,devincoughlin/swift,gribozavr/swift,JaSpa/swift,therealbnut/swift,devincoughlin/swift,codestergit/swift,tkremenek/swift,tkremenek/swift,modocache/swift,LeoShimonaka/swift,karwa/swift,bitjammer/swift,hughbe/swift,lorentey/swift,zisko/swift,practicalswift/swift,natecook1000/swift,danielmartin/swift,KrishMunot/swift,xwu/swift,austinzheng/swift,kstaring/swift,mightydeveloper/swift,dduan/swift,allevato/swift,OscarSwanros/swift,calebd/swift,amraboelela/swift,milseman/swift,aschwaighofer/swift,glessard/swift,deyton/swift,parkera/swift,jtbandes/swift,modocache/swift,jmgc/swift,SwiftAndroid/swift,hughbe/swift,uasys/swift,modocache/swift,atrick/swift,codestergit/swift,JaSpa/swift,calebd/swift,shajrawi/swift,OscarSwanros/swift,KrishMunot/swift,arvedviehweger/swift,kperryua/swift,allevato/swift,milseman/swift,glessard/swift,JGiola/swift,ken0nek/swift,alblue/swift,jopamer/swift,swiftix/swift,arvedviehweger/swift,deyton/swift,karwa/swift,karwa/swift,cbrentharris/swift,tinysun212/swift-windows,Jnosh/swift,jmgc/swift,tjw/swift,therealbnut/swift,roambotics/swift,lorentey/swift,kperryua/swift,jckarter/swift,zisko/swift,frootloops/swift,gmilos/swift,stephentyrone/swift,JGiola/swift,nathawes/swift,LeoShimonaka/swift,johnno1962d/swift,swiftix/swift.old,russbishop/swift,MukeshKumarS/Swift,stephentyrone/swift,ben-ng/swift,brentdax/swift,kusl/swift,deyton/swift,gottesmm/swift,ahoppen/swift,johnno1962d/swift,benlangmuir/swift,shajrawi/swift,milseman/swift,milseman/swift,roambotics/swift,nathawes/swift,ben-ng/swift,therealbnut/swift,SwiftAndroid/swift,ahoppen/swift,hughbe/swift,hughbe/swift,return/swift,bitjammer/swift,gottesmm/swift,gribozavr/swift,adrfer/swift,nathawes/swift,parkera/swift,ben-ng/swift,devincoughlin/swift,mightydeveloper/swift,dreamsxin/swift,nathawes/swift,return/swift,gottesmm/swift,jckarter/swift,russbishop/swift,JaSpa/swift,hooman/swift,swiftix/swift.old,MukeshKumarS/Swift,swiftix/swift.old,tkremenek/swift,CodaFi/swift,adrfer/swift,natecook1000/swift,allevato/swift,zisko/swift,huonw/swift,airspeedswift/swift,karwa/swift,bitjammer/swift,atrick/swift,OscarSwanros/swift,ahoppen/swift,glessard/swift,xedin/swift,practicalswift/swift,xedin/swift,harlanhaskins/swift,stephentyrone/swift,swiftix/swift,ben-ng/swift,shahmishal/swift,return/swift,sdulal/swift,sschiau/swift,apple/swift,arvedviehweger/swift,ben-ng/swift,kstaring/swift,parkera/swift,manavgabhawala/swift,roambotics/swift,LeoShimonaka/swift,shahmishal/swift,kentya6/swift,return/swift,LeoShimonaka/swift,jtbandes/swift,bitjammer/swift,felix91gr/swift,huonw/swift,rudkx/swift,hooman/swift,stephentyrone/swift,lorentey/swift,jmgc/swift,sschiau/swift,return/swift,jtbandes/swift,kstaring/swift,jmgc/swift,amraboelela/swift,parkera/swift,austinzheng/swift,gregomni/swift,johnno1962d/swift,JGiola/swift,jopamer/swift,felix91gr/swift,xedin/swift,JaSpa/swift,uasys/swift,natecook1000/swift,gribozavr/swift,xwu/swift,apple/swift,JaSpa/swift,codestergit/swift,danielmartin/swift,ken0nek/swift,IngmarStein/swift,glessard/swift,allevato/swift,danielmartin/swift,sdulal/swift,arvedviehweger/swift,tardieu/swift,milseman/swift,amraboelela/swift,danielmartin/swift,huonw/swift,dduan/swift,roambotics/swift,xedin/swift,SwiftAndroid/swift,tkremenek/swift,cbrentharris/swift,shahmishal/swift,kentya6/swift,SwiftAndroid/swift,jopamer/swift,LeoShimonaka/swift,aschwaighofer/swift,gregomni/swift,airspeedswift/swift,shahmishal/swift,alblue/swift,sschiau/swift,practicalswift/swift,Ivacker/swift,apple/swift,natecook1000/swift,xwu/swift,parkera/swift,huonw/swift,kperryua/swift,airspeedswift/swift,djwbrown/swift,gottesmm/swift,danielmartin/swift,khizkhiz/swift,zisko/swift,KrishMunot/swift,kusl/swift,atrick/swift,johnno1962d/swift,felix91gr/swift,natecook1000/swift,kstaring/swift,brentdax/swift,alblue/swift,Jnosh/swift,kusl/swift,karwa/swift,shahmishal/swift,kusl/swift,kstaring/swift,xwu/swift,modocache/swift,practicalswift/swift,frootloops/swift,gottesmm/swift,uasys/swift,kperryua/swift,kusl/swift,shahmishal/swift,kentya6/swift,frootloops/swift,cbrentharris/swift,hooman/swift,emilstahl/swift,MukeshKumarS/Swift,sdulal/swift,codestergit/swift,swiftix/swift.old,calebd/swift,sdulal/swift,kentya6/swift,gribozavr/swift,huonw/swift,Jnosh/swift,codestergit/swift,gribozavr/swift,therealbnut/swift,jckarter/swift,harlanhaskins/swift,tjw/swift,frootloops/swift,glessard/swift,kperryua/swift,benlangmuir/swift,OscarSwanros/swift,johnno1962d/swift,MukeshKumarS/Swift,adrfer/swift,lorentey/swift,mightydeveloper/swift,dduan/swift,gmilos/swift,swiftix/swift.old,zisko/swift,alblue/swift,swiftix/swift,xedin/swift,allevato/swift,tkremenek/swift,airspeedswift/swift,slavapestov/swift,atrick/swift,IngmarStein/swift,kstaring/swift,Ivacker/swift,uasys/swift,mightydeveloper/swift,dduan/swift,russbishop/swift,swiftix/swift,therealbnut/swift,gribozavr/swift,kentya6/swift,khizkhiz/swift,nathawes/swift,hooman/swift,russbishop/swift,aschwaighofer/swift,tkremenek/swift,JGiola/swift,milseman/swift,austinzheng/swift,bitjammer/swift,sschiau/swift,adrfer/swift,xwu/swift,amraboelela/swift,kentya6/swift,emilstahl/swift,adrfer/swift,jtbandes/swift,stephentyrone/swift,felix91gr/swift,CodaFi/swift,karwa/swift,roambotics/swift,tkremenek/swift,apple/swift