Fix IDCLEV0x and IDCLEV00 to require 0s...

and not punctuation (IDCLEV,,) etc.
Merge branch 'master' of https://github.com/fabiangreffrath/crispy-doom
Merge pull request #47 from plumsinus/master

Fix IDCLEV0x and IDCLEV00 to require 0s and not e.g. punctuation