Flexelint: Avoid side effect in initializer

src/fellow_cache.c

@@ -5152,6 +5152,7 @@ fellow_cache_obj_delete(struct fellow_cache *fc,
 	/* one additional region for the object itself */
 	struct buddy_off_extent region[FCO_MAX_REGIONS + 1] = {{0}};
 	struct buddy_returns *rets;
+	struct buddy *dskbuddy;
 	struct stvfe_tune *tune;
 	enum fcol_state logstate;
 	fellow_disk_block fdba;
@@ -5162,7 +5163,8 @@ fellow_cache_obj_delete(struct fellow_cache *fc,
 	fdo = FCO_FDO(fco);
 	CHECK_OBJ_NOTNULL(fdo, FELLOW_DISK_OBJ_MAGIC);
 
-	rets = BUDDY_RETURNS_STK(fellow_dskbuddy(fc->ffd), BUDDY_RETURNS_MAX);
+	dskbuddy = fellow_dskbuddy(fc->ffd);
+	rets = BUDDY_RETURNS_STK(dskbuddy, BUDDY_RETURNS_MAX);
 
 	struct fellow_lru_chgbatch lcb[1] =
 	    FELLOW_LRU_CHGBATCH_INIT(lcb, fco, 1);