Fixed a problem in the type checker when LLDB uses it. Debugger variables are stand-ins for variables that exist already in memory, so they should not be default initialized.  This patch ensures that the type checker does not automatically assign such variables a default initializer.
Fixed a problem in the type checker when LLDB uses it.
Debugger variables are stand-ins for variables that
exist already in memory, so they should not be default
initialized.  This patch ensures that the type checker
does not automatically assign such variables a default
initializer.

<rdar://problem/17454678>


Swift SVN r19860

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