FS-6980 #resolve don't crash when using native recording on recordstop the redo

src/switch_ivr_async.c

@@ -1215,12 +1215,13 @@ static switch_bool_t record_callback(switch_media_bug_t *bug, void *user_data, s
 					switch_file_remove(rh->file, switch_core_session_get_pool(session));
 				}
 
+				if (rh->fh) {
+					switch_channel_set_variable_printf(channel, "record_samples", "%d", rh->fh->samples_out);
 					if (read_impl.actual_samples_per_second) {
 						switch_channel_set_variable_printf(channel, "record_seconds", "%d", rh->fh->samples_out / read_impl.actual_samples_per_second);
 						switch_channel_set_variable_printf(channel, "record_ms", "%d", rh->fh->samples_out / (read_impl.actual_samples_per_second / 1000));
 					}
-				switch_channel_set_variable_printf(channel, "record_samples", "%d", rh->fh->samples_out);
-				
+				}
 			}
 			
 			if (switch_event_create(&event, SWITCH_EVENT_RECORD_STOP) == SWITCH_STATUS_SUCCESS) {