Was intended as a simple code improvement, however it also seems to make WinMain, MxString::operator=, MxDSFile::Open 100% (all of which just needed registers to be switched around)
* match WinProc
* minor accuracy improvement
* WndProc at 50%
* fix WM_DISPLAYCHANGE branching
* fix type
* fix x/y comparison
* WndProc 82%
* 84%
* 97%
* rearrange functions to get close to the original
* remove newline
* inline no longer necessary
* merge