Blender Git Loki

Apply patch #5127 by Joseph Eagar (joeedh)

* This addresses the long command-line problem when building with SCons/MingW on windows through a dosbox (cmd.exe).

My test buildpath was: C:Documents and SettingsnathanMy Documentsblenderbuildwin32-mingw
Should be rather long enough, don't you think?

/Nathan