maxint reached?

Has anyone seen this:

ERROR:  dtoi4: integer out of range


on 7.1.3

What worries me, is that at startup time, the log shows:

DEBUG:  database system was shut down at 2002-04-02 23:16:52 EEST
DEBUG:  CheckPoint record at (82, 1928435208)
DEBUG:  Redo record at (82, 1928435208); Undo record at (0, 0); Shutdown TRUE
DEBUG:  NextTransactionId: 517528628; NextOid: 2148849196
DEBUG:  database system is in production state

Note the NextOid, while i /usr/include/machine/limits.h defines INT_MAX as 
2147483647. Are oid really singed ints?

Daniel

PS: This database indeed has an increasing oid counter in that range. Grep 
from the log shows

DEBUG:  NextTransactionId: 386003914; NextOid: 1551075952
DEBUG:  NextTransactionId: 397667914; NextOid: 1643984428
DEBUG:  NextTransactionId: 444453748; NextOid: 1864857132
DEBUG:  NextTransactionId: 450233305; NextOid: 1888540204
DEBUG:  NextTransactionId: 454987662; NextOid: 1917687340
DEBUG:  NextTransactionId: 501775621; NextOid: 2078209580
DEBUG:  NextTransactionId: 517524499; NextOid: 2148849196
DEBUG:  NextTransactionId: 517528628; NextOid: 2148849196

this is from one month ago.