Blender Git Loki

Fix (unreported) `load_file()` func from creator.c not setting G.save_over correctly.

This was rather annoying, since if you were script-editing a .blend file in background
mode, opened through this commandline option system, and wanted to save over,
a mere `bpy.ops.wm.save_mainfile()` *would not* overwrite expected file,
but instead write/replace the dummy `untitled.blend` one!