[Coco] ack!

[William Astle]

There was an issue about the ifp1 warning actually triggering like an 
error in some versions of lwasm. I can't remember when I fixed that.

The difference between using --6309 and --6809 for lwasm has no impact 
on the nitros9 build because it doesn't change the actual environment 
any. The only difference --6309 makes is to enable the 6309 
instructions. Since the 6309 instructions are a proper superset of the 
6809 instructions, this makes absolutely no difference to 6809-only 
code. (In fact, --6309 is the default if neither is specified modulo any 
bugs in option processing.) There's a define (-D/--define) that tells 
the source code which CPU to build for.