Oops, fix recoveryStopsBefore functions for regular commits.

Pointed out by Tom Lane. Backpatch to 9.4, the code was structured
differently in earlier branches and didn't have this mistake.

src/backend/access/transam/xlog.c

@@ -5515,7 +5515,7 @@ recoveryStopsBefore(XLogRecord *record)
 		isCommit = true;
 		recordXid = record->xl_xid;
 	}
-	if (record_info == XLOG_XACT_COMMIT_PREPARED)
+	else if (record_info == XLOG_XACT_COMMIT_PREPARED)
 	{
 		isCommit = true;
 		recordXid = ((xl_xact_commit_prepared *) XLogRecGetData(record))->xid;