FS-11553: [core] do not discard the file if we are appending

src/switch_ivr_async.c

@@ -1499,12 +1499,12 @@ static switch_bool_t record_callback(switch_media_bug_t *bug, void *user_data, s
 				if (file_trimmed) switch_channel_set_variable(channel, "record_trimmed", file_trimmed);
 				switch_core_file_close(rh->fh);
 
-				if (!rh->writes && !rh->vwrites) {
+				if (!rh->writes && !rh->vwrites && !switch_test_flag(rh->fh, SWITCH_FILE_WRITE_APPEND)) {
 					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Discarding empty file %s\n", rh->file);
 					switch_channel_set_variable(channel, "RECORD_DISCARDED", "true");
 					switch_file_remove(rh->file, switch_core_session_get_pool(session));
 					set_completion_cause(rh, "empty-file");
-				} else if (rh->fh->samples_out < rh->fh->samplerate * rh->min_sec) {
+				} else if ((rh->fh->samples_out < rh->fh->samplerate * rh->min_sec) && !switch_test_flag(rh->fh, SWITCH_FILE_WRITE_APPEND)) {
 					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Discarding short file %s\n", rh->file);
 					switch_channel_set_variable(channel, "RECORD_DISCARDED", "true");
 					switch_file_remove(rh->file, switch_core_session_get_pool(session));