Strip paren expressions when trying to diagnose "cast as lvalue"
extension.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69100 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/exprs.c b/test/Sema/exprs.c
index 9db8c92..617eaa0 100644
--- a/test/Sema/exprs.c
+++ b/test/Sema/exprs.c
@@ -34,6 +34,7 @@
 // rdar://6319320
 void test5(int *X, float *P) {
   (float*)X = P;   // expected-error {{assignment to cast is illegal, lvalue casts are not supported}}
+  ((float*)X) = P;   // expected-error {{assignment to cast is illegal, lvalue casts are not supported}}
 }
 
 void test6() {