item: fix undefined zero-size array

src/input/item.c

@@ -772,6 +772,8 @@ void input_item_SetEpgOffline( input_item_t *p_item )
 #ifdef EPG_DEBUG
     vlc_mutex_lock( &p_item->lock );
     const int i_epg_info = p_item->i_epg;
+    if( i_epg_info > 0 )
+    {
         char *ppsz_epg_info[i_epg_info];
         for( int i = 0; i < p_item->i_epg; i++ )
         {
@@ -788,6 +790,9 @@ void input_item_SetEpgOffline( input_item_t *p_item )
             input_item_DelInfo( p_item, ppsz_epg_info[i], NULL );
             free( ppsz_epg_info[i] );
         }
+    }
+    else
+        vlc_mutex_unlock( &p_item->lock );
 #endif
 
     vlc_event_t event = { .type = vlc_InputItemInfoChanged, };