fifo tweaks

src/switch_channel.c

@@ -1072,18 +1072,19 @@ SWITCH_DECLARE(switch_bool_t) switch_channel_clear_flag_partner(switch_channel_t
 
 SWITCH_DECLARE(void) switch_channel_wait_for_state(switch_channel_t *channel, switch_channel_t *other_channel, switch_channel_state_t want_state)
 {
-	switch_channel_state_t state, mystate, ostate;
-	ostate = switch_channel_get_state(channel);
+	switch_channel_state_t state, mystate;
 
 	for (;;) {
-		state = switch_channel_get_running_state(other_channel);
+		if (other_channel) {
+			state = switch_channel_get_running_state(other_channel);
+		}
 		mystate = switch_channel_get_running_state(channel);
 
 		if ((channel->state == channel->running_state && channel->running_state == want_state) ||
-			other_channel->state >= CS_HANGUP || channel->state >= CS_HANGUP) {
+			(other_channel && other_channel->state >= CS_HANGUP) || channel->state >= CS_HANGUP) {
 			break;
 		}
-		switch_cond_next();
+		switch_yield(20000);
 	}
 }