Test conversion from apointer to incomplete type to void* in C++

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60131 91177308-0d34-0410-b5e6-96231b3b80d8

test/SemaCXX/overload-call.cpp

@@ -74,14 +74,17 @@ void test_m() {
 
 int* n(char*);
 double* n(void*);
+class E;
 
-void test_n() {
+void test_n(E* e) {
   char ca[7];
   int* ip1 = n(ca);
   int* ip2 = n("foo");
 
   float fa[7];
   double* dp1 = n(fa);
+
+  double* dp2 = n(e);
 }
 
 enum PromotesToInt {