Fix a few warnings of unused variables in the -no-assertions build.
Fix a few warnings of unused variables in the -no-assertions build.

Swift SVN r24921

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