Tgx file issue

[janso3]

The tgx parser will encounter errors when parsing files from the data/gfx8/ directory.

[FilipJanitor]

Ok, so after playing with it for a while it seems to me that the parser is good and the problem is actually somewhere else - I even checked the parser implementation against this go implementation. For instance, if I place only files named campaign_map_england_10.tgx and campaign_map_england_08.tgx to the gfx8 folder, the parser fails on campaign_map_england_10.tgx. However, when I place only this one file there, it is parsed with no issues. I will try to have a look at that later.