genericAccess.inp: Fix \lilyEffectiveRaise part

After upgrading Ubuntu from 12.04 to 12.10
(texlive 2009-15 -> 2012.20120611-4)
the \lilyXXX commands didn't work anymore:
The scale factor wasn't interpreted anymore but instead printed literally.

I could fix this by removing the curly braces around \lilyEffectiveRaise
in the \raisebox part in the
- \lilyPrint
- \lilyPrintImage
- \lilyImage commands.

It seems that it is backward compatible to the old version,
so I assume the syntax was wrong in the first place but was
just ignored/tolerated