Silence GCC warning for using both enum and unsigned in a ternary expr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186762 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseOpenMP.cpp b/lib/Parse/ParseOpenMP.cpp
index 2f6be9e..59450e7 100644
--- a/lib/Parse/ParseOpenMP.cpp
+++ b/lib/Parse/ParseOpenMP.cpp
@@ -303,7 +303,7 @@
     return 0;
 
   unsigned Type = Tok.isAnnotation() ?
-                     OMPC_DEFAULT_unknown :
+                     unsigned(OMPC_DEFAULT_unknown) :
                      getOpenMPSimpleClauseType(Kind, PP.getSpelling(Tok));
   SourceLocation TypeLoc = Tok.getLocation();
   if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&