Freeze when WAIT line is asserted and Step to next instruction is clicked

[Calindro]

When the WAIT line is asserted and the "Step to next instruction" button is clicked, the whole application freezes.

[floooh]

Ouch yeah, that's because I do something really stupid here which ends up as an infinite loop if the CPU doesn't make progress:

v6502r/src/sim.c

Lines 121 to 125 in bcedbdd

	do {
	prev_m1 = cpu_readM1(sim.cpu_state);
	sim_step(1);
	cur_m1 = cpu_readM1(sim.cpu_state);
	} while (!(prev_m1 && !cur_m1)); // M1 pin is active-low!

Thanks for catching that, it will be a while until I get around fixing the issue though, I'm currently deep in other things.