Index: res/snmp/agent.c
===================================================================
--- res/snmp/agent.c	(revision 69065)
+++ res/snmp/agent.c	(working copy)
@@ -590,21 +590,26 @@
 static u_char *ast_var_channel_bridge(struct variable *vp, oid *name, size_t *length,
 	int exact, size_t *var_len, WriteMethod **write_method)
 {
-	unsigned long long_ret = 0;
+	static unsigned long long_ret;
 	struct ast_channel *chan = NULL;
 
+	long_ret = 0;
 	if (header_generic(vp, name, length, exact, var_len, write_method))
 		return NULL;
 
-	while ((chan = ast_channel_walk_locked(chan))) {
+	for (chan = ast_channel_walk_locked(NULL); chan; chan = ast_channel_walk_locked(chan)) {
 		if (ast_bridged_channel(chan) != NULL)
 			long_ret++;
 		ast_channel_unlock(chan);
 	}
 
-	*var_len = sizeof(long_ret);
-
-	return (vp->magic == ASTCHANBRIDGECOUNT) ? (u_char *) &long_ret : NULL;
+	switch (vp->magic) {
+		case ASTCHANBRIDGECOUNT:
+			return (u_char *)&long_ret;
+		default:
+			break;
+	}
+	return NULL;
 }
 
 static u_char *ast_var_Config(struct variable *vp, oid *name, size_t *length,