isl_pw_aff_set_rational: avoid invalid access on error

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_aff.c b/isl_aff.c
index d8b89ce..e9d7286 100644 (file)
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -2626,14 +2626,15 @@ __isl_give isl_pw_aff *isl_pw_aff_set_rational(__isl_take isl_pw_aff *pwaff)
 __isl_give isl_pw_aff_list *isl_pw_aff_list_set_rational(
        __isl_take isl_pw_aff_list *list)
 {
-       int i;
+       int i, n;
 
        if (!list)
                return NULL;
        if (list->n == 0)
                return list;
 
-       for (i = 0; i < list->n; ++i) {
+       n = list->n;
+       for (i = 0; i < n; ++i) {
                isl_pw_aff *pa;
 
                pa = isl_pw_aff_list_get_pw_aff(list, i);