Re: gdiplus: Remove debug traces from GdipBitmapGetPixel and GdipBitmapSetPixel.

[Vincent Povirk]

> alpha_blend_bmp_pixels() calls them while copying bitmap bits with an
> alpha channel. This makes debug logs huge, hard to analyze, and completely
> unmanagable in size.

GDI+ should be fixed so it doesn't call these functions internally.
It's just not an efficient way to render to bitmaps.