Avoid a texture offset if framebuf attach fails.

But, I'm not sure in what case this could happen.
Merge pull request #6532 from unknownbrackets/gpu-minor

Avoid a texture offset if framebuf attach fails
Skip reporting savedata stuff in known cases.

We were always doing 3 before for 5, so skip reporting it.  Other cases
are the interesting ones.
Stop reporting blits when render mode is swapped.
Kill off some usages of sprintf.
Merge pull request #6535 from thedax/no-sprintf

Kill off some usages of sprintf.