comctl32: Set reference data to zero on failure for GetWindowSubclass().

dlls/comctl32/commctrl.c

@@ -1173,7 +1173,7 @@ BOOL WINAPI GetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
    /* See if we have been called for this window */
    stack = GetPropW (hWnd, COMCTL32_wSubclass);
    if (!stack)
-      return FALSE;
+      goto done;
 
    proc = stack->SubclassProcs;
    while (proc) {
@@ -1186,6 +1186,9 @@ BOOL WINAPI GetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
       proc = proc->next;
    }
 
+done:
+   if (pdwRef)
+      *pdwRef = 0;
    return FALSE;
 }
 

dlls/comctl32/tests/subclass.c

@@ -356,19 +356,16 @@ static void test_GetWindowSubclass(void)
     data = 0xdeadbeef;
     ret = pGetWindowSubclass(NULL, wnd_proc_sub, 2, &data);
     ok(!ret, "GetWindowSubclass succeeded.\n");
-    todo_wine
     ok(data == 0, "Got unexpected data %#Ix.\n", data);
 
     data = 0xdeadbeef;
     ret = pGetWindowSubclass(hwnd, NULL, 2, &data);
     ok(!ret, "GetWindowSubclass succeeded.\n");
-    todo_wine
     ok(data == 0, "Got unexpected data %#Ix.\n", data);
 
     data = 0xdeadbeef;
     ret = pGetWindowSubclass(hwnd, wnd_proc_sub, 0, &data);
     ok(!ret, "GetWindowSubclass succeeded.\n");
-    todo_wine
     ok(data == 0, "Got unexpected data %#Ix.\n", data);
 
     ret = pGetWindowSubclass(hwnd, wnd_proc_sub, 2, NULL);