util/pactree: correctly free the deps list in walk_deps()

If we are reversed, then we were correctly freeing both the list and the
contained data. However, we were leaking a list in the case of a
non-reversed traversal.

Signed-off-by: Dan McGee <dan@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

src/util/pactree.c

@@ -488,6 +488,8 @@ static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int r
 
 	if(rev) {
 		FREELIST(deps);
+	} else {
+		alpm_list_free(deps);
 	}
 }