Fix a scoping bug that apple gcc doesn't catch for some reason.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40450 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Lex/Preprocessor.cpp b/Lex/Preprocessor.cpp
index 96d9c9e..25ddb03 100644
--- a/Lex/Preprocessor.cpp
+++ b/Lex/Preprocessor.cpp
@@ -1695,12 +1695,13 @@
     return;
   
   case tok::angle_string_literal:
-  case tok::string_literal:
+  case tok::string_literal: {
     FilenameBuffer.resize(FilenameTok.getLength());
     FilenameStart = &FilenameBuffer[0];
     unsigned Len = getSpelling(FilenameTok, FilenameStart);
     FilenameEnd = FilenameStart+Len;
     break;
+  }
     
   case tok::less:
     // This could be a <foo/bar.h> file coming from a macro expansion.  In this