PAL video on 480i had some problems with ugly flickering on some televisions and/or settings on these televisions. Some televisions do not seem to have that problem, but on those where the problem is, it looks ugly.
Every video mode in libogc in GetPreferredMode() in video.c has the "Df" flag (deflicker? diffuse?) flag in their names, except the PAL 480i video mode. An own GetPreferredMode() is also not quite possible (at least when trying to not make it ugly), as the Eurgb60Hz modes are not in the video.h file.
Use the correct video mode when PAL 480i is selected, as well fix the header file. An example is included in the added file.
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