[Freeciv-Dev] (PR#10916) AI ferries double move when delivering

["Benedict Adamson" <badamson@xxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=10916 >

The attached auto game reproduces the bug for version 2.0.0beta3. To see 
the bug, watch Caesar found Corfinium (his third city, at 25,12).

Here are some relevant excerpts from the log file:
...
4: Caesar's Settlers[101] (28,11)->(25,12){0,144} got boat[144](moves 
left: 9), going (138492688,48)
4: Caesar's Settlers[101] (26,13)->(25,12){0,144} Our boat has arrived
4: Caesar's Settlers[101] (26,13)->(25,12){0,144} Walking to (25,12)
...
4: Caesar's Trireme[144] (26,13)->(25,12){0,0} Ferryboat is not carrying 
anyone.
4: Caesar's Trireme[144] (26,13)->(25,12){0,0} changing role from 0 to 0
4: Caesar's Trireme[144] (26,13)->(-1,-1){0,0} Ferryboat is looking for 
cargo.
4: Caesar's Trireme[144] (26,13)->(-1,-1){0,0} Found a potential cargo 
Explorer[111](138470128,-1073744008), going there
4: Caesar's Trireme[144] (26,13)->(31,4){0,0} picking up cargo

set gameseed 23
set mapseed 17

set size 1
set generator 2
set startpos 1
set aifill 3
set specials 1000
set startunits cccccxxxx
set dispersion 4
set researchcost 4
set foodbox 5
set huts 0
set barbarians 0
normal

set timeout 0
create Caesar
create Itzcoatl
create Hannibal