SkeletalCreature: fix sprite/ATT loading logic
SkeletalCreature: fix sprite/ATT loading logic

ccdevnet/openc2e,bdonlan/openc2e,bdonlan/openc2e,crystalline/openc2e,bdonlan/openc2e,crystalline/openc2e,ccdevnet/openc2e,crystalline/openc2e,ccdevnet/openc2e,ccdevnet/openc2e,crystalline/openc2e,ccdevnet/openc2e,bdonlan/openc2e,ccdevnet/openc2e,crystalline/openc2e