--- libaitio/src/Attic/vars.c	2011/11/03 14:56:48	1.2.2.3
+++ libaitio/src/Attic/vars.c	2011/12/13 02:22:05	1.2.2.6
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: vars.c,v 1.2.2.3 2011/11/03 14:56:48 misho Exp $
+* $Id: vars.c,v 1.2.2.6 2011/12/13 02:22:05 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -429,7 +429,7 @@ io_map2vars(u_char *buf, int buflen, int vnum, int zcp
  * return: =NULL error or !=NULL allocated array
  */
 inline array_t *
-io_allocVars(u_int varnum)
+io_allocVars(int varnum)
 {
 	array_t *arr;
 	register int i;
@@ -456,12 +456,15 @@ io_allocVars(u_int varnum)
 /*
  * io_clrVars() Clear ait_val_t elements from array
  * @vars = Variable array
- * return: none
+ * return: -1 error or size of array
  */
 inline int
 io_clrVars(array_t * __restrict vars)
 {
 	register int i;
+
+	if (!vars)
+		return -1;
 
 	for (i = 0; i < io_arraySize(vars); i++)
 		if (io_arrayGet(vars, i))