Fix false negative in -Wuninitialized involving a () wrapping an lvalue-to-rvalue conversion in a DeclStmt.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135525 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/uninit-variables.c b/test/Sema/uninit-variables.c
index 6c3c7c7..914156d 100644
--- a/test/Sema/uninit-variables.c
+++ b/test/Sema/uninit-variables.c
@@ -354,8 +354,8 @@
 }
 
 void test53() {
-  int x;
-  int y = (x);
+  int x; // expected-note {{variable 'x' is declared here}} expected-note {{add initialization to silence this warning}}
+  int y = (x);  // expected-warning {{variable 'x' is uninitialized when used here}}
 }
 
 // This CFG caused the uninitialized values warning to inf-loop.