simplify some code.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64893 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index 4e4d009..a147ee4 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -1600,12 +1600,10 @@
     AtLocs.push_back(ConsumeToken()); // eat the @.
 
     // Invalid unless there is a string literal.
-    OwningExprResult Lit(Actions, true);
-    if (isTokenStringLiteral())
-      Lit = ParseStringLiteralExpression();
-    else
-      Diag(Tok, diag::err_objc_concat_string);
+    if (!isTokenStringLiteral())
+      return ExprError(Diag(Tok, diag::err_objc_concat_string));
 
+    OwningExprResult Lit(ParseStringLiteralExpression());
     if (Lit.isInvalid())
       return move(Lit);