SDL_UDEV_DelCallback: return early if _this is NULL
Fixes https://github.com/libsdl-org/SDL/issues/6548
(cherry picked from commit 6dc96aa745
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@ -544,6 +544,10 @@ SDL_UDEV_DelCallback(SDL_UDEV_Callback cb)
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SDL_UDEV_CallbackList *item;
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SDL_UDEV_CallbackList *item;
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SDL_UDEV_CallbackList *prev = NULL;
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SDL_UDEV_CallbackList *prev = NULL;
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if (_this == NULL) {
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return;
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}
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for (item = _this->first; item != NULL; item = item->next) {
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for (item = _this->first; item != NULL; item = item->next) {
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/* found it, remove it. */
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/* found it, remove it. */
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if (item->callback == cb) {
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if (item->callback == cb) {
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