Use the unqualified type for GCCs struct/union cast extension

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62170 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/struct-cast.c b/test/Sema/struct-cast.c
new file mode 100644
index 0000000..734be80
--- /dev/null
+++ b/test/Sema/struct-cast.c
@@ -0,0 +1,14 @@
+// RUN: clang -fsyntax-only %s -verify
+
+struct S {
+ int one;
+ int two;
+};
+
+struct S const foo(void);
+
+struct S tmp;
+
+void priv_sock_init() {
+  tmp = (struct S)foo();
+}