Fix assembly
Fix assembly

More modern ca65 versions don’t allow
negative values as constants. This commit
disables the range-check and re-enables the
assembly.

http://www.cc65.org/mailarchive/2012-01/9892.html

kervinck/gigatron-rom,kervinck/gigatron-rom,kervinck/gigatron-rom,kervinck/gigatron-rom,kervinck/gigatron-rom,kervinck/gigatron-rom,kervinck/gigatron-rom