SVN-3721: crash switching bases

[HaJo]

I built a second base with a dropship-hangar.
When it got finished, I inspected it, and also tried to hire soldiers
(but none were available).
Switching back to base#1, the program crashed with this error:

Code: [Select]

CL_UpdateHireVar: SoldiersInBase: 8, teamNum(0): 8, p: 0

ufoconsole.log:

Code: [Select]

ExecuteString: '+select 178 6537003'
ExecuteString: 'mn_pop'
ExecuteString: '-select 178 6537149'
ExecuteString: '+select 178 6543642'
ExecuteString: 'mn_next_base'
cur-base=1 num-base=2
new-base=0
ExecuteString: 'mn_select_base 0'
B_SelectBase: select base with id 0
CL_IsInAircraftTeam:not found idx '0'
CL_IsInAircraftTeam:not found idx '1'
CL_IsInAircraftTeam:not found idx '2'
CL_IsInAircraftTeam:not found idx '3'
CL_IsInAircraftTeam:not found idx '4'
CL_IsInAircraftTeam:not found idx '5'
CL_IsInAircraftTeam:not found idx '6'
CL_IsInAircraftTeam:not found idx '7'
CL_IsInAircraftTeam:not found idx '8'
CL_IsInAircraftTeam:not found idx '9'
CL_IsInAircraftTeam:not found idx '10'
CL_IsInAircraftTeam:not found idx '11'
CL_IsInAircraftTeam:not found idx '12'
CL_IsInAircraftTeam:not found idx '13'
CL_IsInAircraftTeam:not found idx '14'
CL_IsInAircraftTeam:not found idx '15'
CL_IsInAircraftTeam:not found idx '16'
CL_IsInAircraftTeam:not found idx '17'
CL_IsInAircraftTeam:not found idx '18'
SDL audio device shut down.
Shader shutdown


Issue  1564035 on sf.net,
https://sourceforge.net/tracker/index.php?func=detail&aid=1564035&group_id=157793&atid=805242