Fix assertion failure in UninitializedValues.cpp where an lvalue to rvalue conversion is wrapped in a parenthesis.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135519 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/uninit-variables.c b/test/Sema/uninit-variables.c
index 0caab3d..6c3c7c7 100644
--- a/test/Sema/uninit-variables.c
+++ b/test/Sema/uninit-variables.c
@@ -353,6 +353,11 @@
   return x; // expected-warning {{variable 'x' may be uninitialized when used here}}
 }
 
+void test53() {
+  int x;
+  int y = (x);
+}
+
 // This CFG caused the uninitialized values warning to inf-loop.
 extern int PR10379_g();
 void PR10379_f(int *len) {