add engine version check for 8->7 message number conversion (don't look now, but i think creatures is made out of hacks)
add engine version check for 8->7 message number conversion (don't look now, but i think creatures is made out of hacks)

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