[Done] Techtree validator: Report error when total # factions = 0

[tomreyn]

It would be nice if the techtree validator were to report an error when there are no factions in a given techtree.

Currently it produces the following output in this case:

Code: [Select]

$ ./megaglest --validate-techtrees=vbros_pack_1
====== Started Validation ======
Filtering techtrees and only looking for the following:
vbros_pack_1

---------------- Loading factions inside world ----------------
====== Finished Validation ======
$


[softcoder]

Added in svn rev#: 4585

[tomreyn]

Thank you!