[PATCH libnftnl 4/7] expr: nftnl_expr_parse: use nftnl_expr_free on error unwind

[Florian Westphal <fw@strlen.de>]

nftnl_expr_alloc already ran ->init(expr) and ->parse may have allocating sub-objects
in the data[] region, those allocations leak.

Example is dynset.c: parser might have allocated the set_name, then
encountered a pars error when handling the embedded expressions.

Signed-off-by: Florian Westphal <fw@strlen.de>
---
 src/expr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/expr.c b/src/expr.c
index 0fec358e7480..6462119e3eb2 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -284,7 +284,7 @@ struct nftnl_expr *nftnl_expr_parse(struct nlattr *attr)
 	return expr;
 
 err2:
-	xfree(expr);
+	nftnl_expr_free(expr);
 err1:
 	return NULL;
 }
-- 
2.55.0