Peace Walker intro video not automatically returning to title screen since v0.9.6-455

[Silanda]

The intro video does not return to the title screen as it should after finishing playing. Pressing start is necessary to return. Only a complete reversion of sceMpeg.cpp to its state prior to pull request #5044 fixes this. The problem is still present after #5212.

[unknownbrackets]

Gods Eater Burst is also hitting a break instruction now, I'm pretty sure since one of those two commits.

-[Unknown]

[thedax]

I can't reproduce GEB hanging on finishing its intro, but Peace Walker is 'hanging', yeah, until the user presses start.

[unknownbrackets]

Gods Eater Burst hits a break instruction. The default settings are to ignore these instructions.

The PSP crashes if it hits such an instruction (it's a breakpoint.)

-[Unknown]

[thedax]

The Peace Walker hang is caused by #5212. If I set the decoding result back to 0, it works fine.