py/objarray: Fix sign mismatch in comparison.
Found when compiling with clang and -Wsign-compare.
@@ -472,7 +472,7 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
}
#endif
if (len_adj > 0) {
- if (len_adj > o->free) {
+ if ((size_t)len_adj > o->free) {
// TODO: alloc policy; at the moment we go conservative
o->items = m_renew(byte, o->items, (o->len + o->free) * item_sz, (o->len + len_adj) * item_sz);
o->free = len_adj;
