dbus: Fix handling of input events and remove memleaks

Correctly handle the INPUT_EVENT_ITEM_META and INPUT_EVENT_ITEM_META
instead of skipping the whole event processing code without even freeing
the callback_info_t data structure.

Closes: #8285
(cherry picked from commit 01b2d9f038211e91fd2348858d58931f0a48faa1)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/control/dbus/dbus.c

@@ -904,10 +904,10 @@ static int InputIntfEventCallback( intf_thread_t   *p_intf,
             break;
         case INPUT_EVENT_ITEM_META:
             p_info->signal = SIGNAL_INPUT_METADATA;
-            return VLC_SUCCESS;
+            break;
         case INPUT_EVENT_RATE:
             p_info->signal = SIGNAL_RATE;
-            return VLC_SUCCESS;
+            break;
         case INPUT_EVENT_POSITION:
             /* Detect seeks
              * XXX: This is way more convoluted than it should be... */