Merge pull request #143 from Ongy/signal_remove

fixes use after free caused by signal lists

types/wlr_input_device.c

@@ -30,7 +30,7 @@ void wlr_input_device_destroy(struct wlr_input_device *dev) {
 	}
 
 	wl_signal_emit(&dev->events.destroy, dev);
-	
+
 	if (dev->_device) {
 		switch (dev->type) {
 		case WLR_INPUT_DEVICE_KEYBOARD:
@@ -58,6 +58,7 @@ void wlr_input_device_destroy(struct wlr_input_device *dev) {
 	if (dev->impl && dev->impl->destroy) {
 		dev->impl->destroy(dev);
 	} else {
+		wl_list_remove(&dev->events.destroy.listener_list);
 		free(dev);
 	}
 }

types/wlr_keyboard.c

@@ -14,6 +14,7 @@ void wlr_keyboard_destroy(struct wlr_keyboard *kb) {
 	if (kb && kb->impl && kb->impl->destroy) {
 		kb->impl->destroy(kb);
 	} else {
+		wl_list_remove(&kb->events.key.listener_list);
 		free(kb);
 	}
 }

types/wlr_pointer.c

@@ -17,6 +17,10 @@ void wlr_pointer_destroy(struct wlr_pointer *pointer) {
 	if (pointer && pointer->impl && pointer->impl->destroy) {
 		pointer->impl->destroy(pointer);
 	} else {
+		wl_list_remove(&pointer->events.motion.listener_list);
+		wl_list_remove(&pointer->events.motion_absolute.listener_list);
+		wl_list_remove(&pointer->events.button.listener_list);
+		wl_list_remove(&pointer->events.axis.listener_list);
 		free(pointer);
 	}
 }