[win]Fixes #125 and #117 by adjusting pixel to texel ratio on DirectX9.

See this for clarification:
http://msdn.microsoft.com/en-us/library/windows/desktop/bb219690(v=vs.85).aspx
Merge branch 'BugFixing' of https://github.com/DarthMike/indielib-crossplatform into BugFixing