Disable assert in clog

This is required to have rewind functionality on heap tables

Author: pashkinelfe

src/backend/access/transam/clog.c

@@ -591,10 +591,10 @@ TransactionIdSetStatusBit(TransactionId xid, XidStatus status, XLogRecPtr lsn, i
 	 * Current state change should be from 0 or subcommitted to target state
 	 * or we should already be there when replaying changes during recovery.
 	 */
-	Assert(curval == 0 ||
-		   (curval == TRANSACTION_STATUS_SUB_COMMITTED &&
-			status != TRANSACTION_STATUS_IN_PROGRESS) ||
-		   curval == status);
+//	Assert(curval == 0 ||
+//		   (curval == TRANSACTION_STATUS_SUB_COMMITTED &&
+//			status != TRANSACTION_STATUS_IN_PROGRESS) ||
+//		   curval == status);
 
 	/* note this assumes exclusive access to the clog page */
 	byteval = *byteptr;