Add the FullExprArg wrapper and use it for if statement conditions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71982 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseStmt.cpp b/lib/Parse/ParseStmt.cpp
index 50db966..16b7a9f 100644
--- a/lib/Parse/ParseStmt.cpp
+++ b/lib/Parse/ParseStmt.cpp
@@ -632,7 +632,7 @@
   if (ElseStmt.isInvalid())
     ElseStmt = Actions.ActOnNullStmt(ElseStmtLoc);
 
-  return Actions.ActOnIfStmt(IfLoc, move(CondExp), move(ThenStmt),
+  return Actions.ActOnIfStmt(IfLoc, Actions.FullExpr(CondExp), move(ThenStmt), 
                              ElseLoc, move(ElseStmt));
 }