[Freeciv-Dev] (PR#8523) historian agent leaks memory?

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=8523 >

It looks to me like previous_tiles is allocated each time a game starts. 
  This means if you disconnect and reconnect it will be reallocated.

Note that MAX_MAP_INDEX applies only to the current game, it is not an 
asolute maximum.  So if you disconnect and reconnect you do have to 
reallocate this array.

I suggest the use of realloc().

jason