[PATCH] typo in filter.c

Small typo in filter.c:filter_menu(). Not a bug, because quat_time
and double_time currently have the same size.

diff -urp tin-1.9.6/src/filter.c tin-1.9.6_r1/src/filter.c
--- tin-1.9.6/src/filter.c	2010-11-13 00:41:57.000000000 +0100
+++ tin-1.9.6_r1/src/filter.c	2010-12-09 22:17:06.000000000 +0100
@@ -1328,7 +1328,7 @@ filter_menu(
 	 * Expire time
 	 */
 	snprintf(double_time, sizeof(double_time), "2x %s", text_time);
-	snprintf(quat_time, sizeof(double_time), "4x %s", text_time);
+	snprintf(quat_time, sizeof(quat_time), "4x %s", text_time);
 	list = my_malloc(sizeof(char *) * 4);
 	list[0] = (char *) _(txt_unlimited_time);
 	list[1] = text_time;