Create and copy the meta array only if the copied item does have one.

src/input/item.c

@@ -896,9 +896,13 @@ input_item_t *input_item_Copy( vlc_object_t *p_obj, input_item_t *p_input )
                                   p_input->ppsz_options[i],
                                   p_input->optflagv[i] );
         }
+
+        if( p_input->p_meta )
+        {
             p_new_input->p_meta = vlc_meta_New();
             vlc_meta_Merge( p_new_input->p_meta, p_input->p_meta );
         }
+    }
 
     vlc_mutex_unlock( &p_input->lock );