Fix unreachable code warning by tightening code.  No functionality change.
Fix unreachable code warning by tightening code.  No functionality change.

Swift SVN r14055

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