Fixed terminating due to a corrupt savegame.

When in the load dialog a corrupt savegame was selected the game would
terminate due to an unhandled exception. If the savegame was the newest
savegame it was no longer possible to open the dialog at all.

(Fixes bug #20290.)

(Browse SVN revision 56267)

After removing the erroneous save, were you able to continue the game from turn 14? (I tried to load it, but I don't have the right add-ons installed.)

A quick clarification: when the game said "cannot be created", it really meant "cannot be created successfully" -- the file exists, but it appears to be truncated. (It is smaller than the turn 14 save, and my decompressor tells me it is corrupt.) It seems as though BfW choked in the middle of creating the file.

I see three issues here:

1) Something caused BfW to choke mid-save.

2) After choking, the useless incomplete save was not deleted. (Or maybe after choking, the game should have tried an uncompressed save so we can see what is in it?)

3) The incomplete save causes BfW to crash when calling up the "Load Game" dialog (because nothing handles the gzip_error exception).

The latter two are probably easy to address for someone who is familiar with those parts of the code (not me at the moment). The first might be tricky to track down if it cannot be reliably reproduced. (In fact, the first might be more the fault of UMC WML than the game itself, but that remains to be seen.)