fix switch_ivr

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3821 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr.c

@@ -450,7 +450,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_record_file(switch_core_session_t *se
             break;
         }
 
-		if (args->input_callback || args->buf || args->buflen) {
+		if (args && (args->input_callback || args->buf || args->buflen)) {
 			/*
 			  dtmf handler function you can hook up to be executed when a digit is dialed during playback 
 			  if you return anything but SWITCH_STATUS_SUCCESS the playback will stop.
@@ -1161,7 +1161,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_play_file(switch_core_session_t *sess
 			switch_event_destroy(&event);
 		}
 
-		if (args->input_callback || args->buf || args->buflen) {
+		if (args && (args->input_callback || args->buf || args->buflen)) {
 			/*
 			  dtmf handler function you can hook up to be executed when a digit is dialed during playback 
 			  if you return anything but SWITCH_STATUS_SUCCESS the playback will stop.
@@ -1558,7 +1558,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_speak_text_handle(switch_core_session
 			switch_event_destroy(&event);
 		}
 
-		if (args->input_callback || args->buf || args->buflen) {
+		if (args && (args->input_callback || args->buf || args->buflen)) {
 			/*
 			dtmf handler function you can hook up to be executed when a digit is dialed during playback 
 			if you return anything but SWITCH_STATUS_SUCCESS the playback will stop.