30e1018 windows.c: Use a zeroed buffer w...

based on: http://github.com/torvalds/subsurface/commit/30e10183caa3adaf088b9677b628c1d3512dfaf5

compiled with: mingw 3.4.5

notes:
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>