X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=osl.c;h=9843a02034fc8927bdcce36be4bc6f7959d6f88d;hp=5c80641930af2125cdaf7b7ad17e880abbc16c93;hb=f9d356c65720f944550f36af6dd364d0f0869dde;hpb=f3a22620ec1091b6a56152eacd9fcf5560b7bf1d

diff --git a/osl.c b/osl.c
index 5c806419..9843a020 100644
--- a/osl.c
+++ b/osl.c
@@ -2013,8 +2013,17 @@ int osl_get_nth_row(const struct osl_table *t, unsigned col_num,
 {
 	struct osl_column *col;
 	struct rb_node *node;
-	int ret = check_rbtree_col(t, col_num, &col);
+	unsigned num_rows;
+	int ret;
 
+	if (n == 0)
+		return -E_RB_KEY_NOT_FOUND;
+	ret = osl_get_num_rows(t, &num_rows);
+	if (ret < 0)
+		return ret;
+	if (n > num_rows)
+		return -E_RB_KEY_NOT_FOUND;
+	ret = check_rbtree_col(t, col_num, &col);
 	if (ret < 0)
 		return ret;
 	node = rb_nth(col->rbtree.rb_node, n);