fixing width error in porrectus flexus deminutus

only with second ambitus of one
fixing possibility to block custos from gabc
fixing autotools error
setup compiler can now be executed in the dev tree
Merge commit '04fee0a655c69d9e6b34b615b1801ac3ef9bea92'

* commit '04fee0a655c69d9e6b34b615b1801ac3ef9bea92':
  setup compiler can now be executed in the dev tree
  fixing autotools error
  fixing possibility to block custos from gabc
  fixing width error in porrectus flexus deminutus