[Freeciv-Dev] (PR#13661) caravan popups are inaccurate

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=13661 >

When you move more than one caravan into a city to build a wonder, you 
get a popup for each.  The second and thereafter popups are inaccurate 
in their numbers.

The first one shows the right numbers.
All the others are off by one caravan.  So the second caravan doesn't 
know about the first; the third caravan knows about the first but not 
the second; etc.

-jason