Fix a -Wstring-plus-int warning.

Patch from Sean Silva <silvas@purdue.edu>!



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152030 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Rewrite/RewriteMacros.cpp b/lib/Rewrite/RewriteMacros.cpp
index d569100..74400c7 100644
--- a/lib/Rewrite/RewriteMacros.cpp
+++ b/lib/Rewrite/RewriteMacros.cpp
@@ -167,7 +167,7 @@
       // Comment out a whole run of tokens instead of bracketing each one with
       // comments.  Add a leading space if RawTok didn't have one.
       bool HasSpace = RawTok.hasLeadingSpace();
-      RB.InsertTextAfter(RawOffs, " /*"+HasSpace);
+      RB.InsertTextAfter(RawOffs, &" /*"[HasSpace]);
       unsigned EndPos;
 
       do {