Make al_pop return null on empty lists instead of crashing

darcs-hash:20061025203433-ac50b-5d3a18d788d6f36dffe1136664f029a500989db9.gz

1 files changed, 10 insertions, 1 deletions

diff --git a/util.c b/util.c
index 5f00c54b..3c0ee968 100644
--- a/util.c
+++ b/util.c
@@ -948,7 +948,16 @@ void al_truncate( array_list_t *l, int new_sz )
 
 static anything_t al_pop_generic( array_list_t *l )
 {
-	anything_t e = l->arr[--l->pos];
+	anything_t e;
+
+	if( l->pos <= 0 )
+	{
+		memset( &e, 0, sizeof(anything_t ) );
+		return e;
+	}
+	
+	
+	e = l->arr[--l->pos];
 	if( (l->pos*3 < l->size) && (l->size < MIN_SIZE) )
 	{
 		anything_t *old_arr = l->arr;