Minor refactor

src/fellow_cache.c

@@ -4125,7 +4125,7 @@ fellow_cache_obj_deref_locked(struct fellow_cache *fc,
     struct fellow_cache_obj *fco)
 {
 	struct fellow_cache_seg *fcs;
-	unsigned refcnt;
+	unsigned last, refcnt;
 
 	CHECK_OBJ_NOTNULL(fc, FELLOW_CACHE_MAGIC);
 	CHECK_OBJ_NOTNULL(fco, FELLOW_CACHE_OBJ_MAGIC);
@@ -4135,16 +4135,15 @@ fellow_cache_obj_deref_locked(struct fellow_cache *fc,
 
 	assert_cache_seg_consistency(fcs);
 
-	if (fcs->refcnt == 1 && fcs->fco_infdb) {
-		refcnt = fellow_cache_seg_deref_locked(fc, fcs);
+	last = fcs->refcnt == 1 && fcs->fco_infdb;
+	refcnt = fellow_cache_seg_deref_locked(fc, fcs);
+	if (last) {
 		fcs->fco_infdb = 0;
 		AZ(refcnt);
 		/* REF_FDB_REMOVE */
 		AZ(pthread_mutex_lock(&fc->fdb_mtx));
 		(void) VRBT_REMOVE(fellow_cache_fdb_head, &fc->fdb_head, fco);
 		AZ(pthread_mutex_unlock(&fc->fdb_mtx));
-	} else {
-		refcnt = fellow_cache_seg_deref_locked(fc, fcs);
 	}
 	return (refcnt);
 }