gxtest_tev randomly fails

[Pokechu22]

Sometimes, the tev test fails.

Here's a log from real hardware (I quit partway in by pressing the HOME button): tev.txt

I don't have a consistent way of reproducing, but I've never seen it pass initially and then fail partway through; it's either consistently passing, or frequently failing. I've had this happen with #48, but also without it. (Unfortunately I'm not certain if the issue persists between builds, or happens inconsistently with the same elf file.)

[Pokechu22]

I had this happen again while testing #47. Without rebuilding, it happened two times, and then the third time I ran it it didn't happen (in all 3 cases, it was the same executable: gxtest_tev.zip). I didn't catch the full log the first time around, but here's the end of it: tev2.txt. The second time, I did get the log: tev3.txt - note that this does not match the start of tev.txt from yesterday.

There is a chance that this is a hardware failure with my main Wii; I know it has a few bits of bad RAM (as that affected #43) but otherwise things seem mostly fine.