[Backport rev. 39135 by mwh]

[Backport rev. 39135 by mwh]

Fix bug

[ 1232517 ] OverflowError in time.utime() causes strange traceback

A needed error check was missing.

(Actually, this error check may only have become necessary in fairly
recent Python, not sure).

Backport candidate.

[A few lines below the code in 2.4 touched by the patch, there's already
 a similar check of (intval == -1 && PyErr_Occurred()), so I think
 this function can already report such errors, and therefore the fix
 still applies.  Perhaps Michael can clarify what he was referring to. --amk]