Allow the fixit for missing ':' in the ?: ternary operator if it is pointing
at the start of a macro instantiation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133801 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 154d8fd..218e18f 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -309,8 +309,9 @@
         // suggest inserting the colon in between them, otherwise insert ": ".
         SourceLocation FILoc = Tok.getLocation();
         const char *FIText = ": ";
-        if (FILoc.isFileID()) {
-          const SourceManager &SM = PP.getSourceManager();
+        const SourceManager &SM = PP.getSourceManager();
+        if (FILoc.isFileID() || SM.isAtStartOfMacroInstantiation(FILoc)) {
+          FILoc = SM.getInstantiationLoc(FILoc);
           bool IsInvalid = false;
           const char *SourcePtr =
             SM.getCharacterData(FILoc.getFileLocWithOffset(-1), &IsInvalid);