Make psh/pul error out if no registers given While the generated object code was technically correct for bare pshs, puls, pshu, and pulu, it was not helpful. Throw a bad operand error if no registers are given as an operand to such instructions. Thanks to Erik G <erik@6809.org> for reporting the problem.

\.exe$
\.o$
\.d$
\.a$
~$
\.orig$
/lwbasic$
/lwlink$
/lwobjdump$
/lwar$
/lwasm$
/lwcc/lwcc$
/lwcc/lwcpp$

# for windows
\.suo$
\.sdf$
\.opensdf$
\Debug$
\Release$