gx: revise __GXCPInterruptHandler to avoid spurious underflow/overflo…

…w IRQs

resolve impossible constraints at O0. Closes #255

tuxedo: readd default system call exception handler

socket: wii only supports IPPROTO_IP

machine/processor.h: restore mask32

fetch tags after safe directory

CON_Init: truncate console to fit framebuffer, clear framebuffer to b…

…lack (#248)

prevent cyclic dependency between libogc & wiiuse (#245)

network_wii: fix incorrect STACK_ALIGN usage

ensure proper libversion is built