Why? So mods that reveal enemy names don't show internal monster class names.
Tags are based on language.enu lump:
- Tags for Doom/Doom 2 monsters are referring directly to CC_* strings.
- Tags for Heretic monsters are based on obituaries.
- All tags match corresponding obituaries.
(cherry picked from commit 97aba0c416)
- fixed emission of the self pointer in FxVMFunctionCall. I did not realize that the self expression only sets up a register for the value, not pushing it onto the stack.