rP2df7ea13a387

PhabricatorModularTransactionType: fix regression

Summary:
Fix a regression in this specific point:

phutil_nonempty_string(integer) called at [<phorge>/src/applications/transactions/storage/PhabricatorModularTransactionType.php:342]

This regression was causing a broken Almanac page and maybe others.

Note: The function phutil_nonempty_string() is well-known to be very angry and
throws for any alien value. This is by design, and in many cases
this is appropriate. But not here.

The business logic…