Effects fail to compile on PowerPC for non debug builds

[Fancy2209]

I have no idea why, but this check:

mojoshader/mojoshader_effects.c

Lines 995 to 999 in 6c90330

	if (!((magic == 0xFEFF) && (version_major == 0x09) && (version_minor == 0x01)))
	{
	MOJOSHADER_deleteEffect(retval);
	return &MOJOSHADER_not_an_effect_effect;
	} // if

Fails under release builds on PowerPC and PowerPC64
However when I set CMAKE_BUILD_TYPE to Debug, it magically starts working...
Seen on ArchPOWER on the PS3 and Wii, actual PowerPC Macs should be able to reproduce this though.

[flibitijibibo]

A couple goofy ideas to run locally:

• Invert the if ! to be if and run the normal path, and make the ! path an else path
• printf the magic/major/minor values just before, maybe this will force some kind of aliasing that the optimizer is avoiding?