Fix a silly assertion failure with a file with no valid decls.  <rdar://problem/11600182>.
Fix a silly assertion failure with a file with no valid decls.  <rdar://problem/11600182>.



Swift SVN r2179

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