Fix <rdar://problem/6505139> [clang on growl]: need to allow unnamed selectors as the first argument


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64320 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index 338e770..8bb6e11 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -687,7 +687,8 @@
   SourceLocation selLoc;
   IdentifierInfo *SelIdent = ParseObjCSelector(selLoc);
 
-  if (!SelIdent) { // missing selector name.
+  // An unnamed colon is valid.
+  if (!SelIdent && Tok.isNot(tok::colon)) { // missing selector name.
     Diag(Tok, diag::err_expected_selector_for_method)
       << SourceRange(mLoc, Tok.getLocation());
     // Skip until we get a ; or {}.