2.05.2:minrog:3 West African holding display issue

The Sosso, Jolof and Bafour cultures were using standard European castle
graphics, where Manden culture wasn't.  Possible fallback issues with a
DLC,; is africangfx even a functional definition in CK2_?

I made the other 3 West African cultures have the same primary
graphical_culture as Manden does, but I didn't mess with the main
west_african culture group settings.