imfile: remove state file on file delete fix

The state file would remain in the working directory
after shutdown, even though deleteStateOnfileDelete is
set to "on" and the monitored file was removed.

Fixes #5258

plugins/imfile/imfile.c

@@ -1153,6 +1153,7 @@ fs_node_destroy(fs_node_t *const node)
 	DBGPRINTF("node destroy: %p edges:\n", node);
 
 	for(edge = node->edges ; edge != NULL ; ) {
+		detect_updates(edge);
 		fs_node_destroy(edge->node);
 		fs_edge_t *const toDel = edge;
 		edge = edge->next;