app_record: Do not hang up if beep audio is missing

Additionally alter the warning to mention that it was "beep" which could
not be streamed to give admins a better clue about what the warning
means.

ASTERISK-28682

Change-Id: If5aed21226a173117ed17589f44826dd1ba6576e

apps/app_record.c

@@ -358,7 +358,8 @@ static int record_exec(struct ast_channel *chan, const char *data)
 		if (!res) {
 			res = ast_waitstream(chan, "");
 		} else {
-			ast_log(LOG_WARNING, "ast_streamfile failed on %s\n", ast_channel_name(chan));
+			ast_log(LOG_WARNING, "ast_streamfile(beep) failed on %s\n", ast_channel_name(chan));
+			res = 0;
 		}
 		ast_stopstream(chan);
 	}