qt4: selector: Fix leak on unhandled command

modules/gui/qt4/components/playlist/selector.cpp

@@ -367,7 +367,9 @@ void PLSelector::setSource( QTreeWidgetItem *item )
 
             services_discovery_descriptor_t *p_test = new services_discovery_descriptor_t;
             int i_ret = playlist_ServicesDiscoveryControl( THEPL, qtu( qs ), SD_CMD_DESCRIPTOR, p_test );
-            if( i_ret == VLC_SUCCESS && p_test->i_capabilities & SD_CAP_SEARCH )
+            if ( i_ret != VLC_SUCCESS )
+                delete p_test;
+            else if ( p_test->i_capabilities & SD_CAP_SEARCH )
                 item->setData( 0, CAP_SEARCH_ROLE, true );
         }
     }