bug: money window - month trips not displayed correctly

[jk271]

Hello, I have discovered bug in finance window (money_frame) in latest development version of simutrans.

Line with "trips" containing amount of transported goods has same values in both (year, month) tabs.
= Tab containing data for current and last month contains "trips" values of current and last year.

Attached patch can solve this bug.

P.S. A was not sure, where to post it. Is it a bug report as it reports a bug or a patch release as it contains a patch?

[Dwachs]

Thank you! Incorporated in r 5239.