winhttp: Return an error from WinHttpReceiveResponse if there's no connection.

dlls/winhttp/request.c

@@ -2736,6 +2736,12 @@ static BOOL receive_response( struct request *request, BOOL async )
     BOOL ret;
     DWORD size, query, status;
 
+    if (!request->netconn)
+    {
+        SetLastError( ERROR_WINHTTP_INCORRECT_HANDLE_STATE );
+        return FALSE;
+    }
+
     netconn_set_timeout( request->netconn, FALSE, request->receive_response_timeout );
     for (;;)
     {

dlls/winhttp/tests/winhttp.c

@@ -2086,6 +2086,11 @@ static void test_resolve_timeout(void)
         ok(GetLastError() == ERROR_WINHTTP_NAME_NOT_RESOLVED,
            "expected ERROR_WINHTTP_NAME_NOT_RESOLVED got %u\n", GetLastError());
 
+        ret = WinHttpReceiveResponse( req, NULL );
+        ok( !ret && (GetLastError() == ERROR_WINHTTP_INCORRECT_HANDLE_STATE ||
+                     GetLastError() == ERROR_WINHTTP_OPERATION_CANCELLED /* < win7 */),
+            "got %u\n", GetLastError() );
+
         WinHttpCloseHandle(req);
         WinHttpCloseHandle(con);
         WinHttpCloseHandle(ses);