Fix EmitCaseStmtRange to ignore empty ranges
 - Also cleaned up emission slightly 
 - Inspection of the code revealed several other bugs, however. Case
   ranges are not properly wired and can result in switch cases being
   dropped or even infinite loops. See: <rdar://problem/6098585>

Completes: <rdar://problem/6094119>


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53975 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed