More ideas for optimizations

[neauoire]

Hello :)

I have a couple more ideas for optimizations.

• I see in the generated code a few instances of #00 ORA, which could be removed.
• Static arithmetic in oneko, like ;theCursor_ #0004 ADD2, which could be merged into a LIT2.
• Another static arithmetic operation is #0100 SWP, this could be #0001.
• In the atoi implementation, you'll find DUP2 #0000 EQU2, which could be turned into ORAk #00 EQU
• #0000 SWP, to #0000