configure: Use linker hardening flags on mingw

This makes it consistent with the msvc builds which automatically set
the DEP and ASLR flags by default.  There really is no good reason why
they shouldn't be set.

The fact that binutils does not set them on by default boggles the mind.

Signed-off-by: Martin Storsjö <martin@martin.st>
vc1: Reindent INIT_LUT(), align backslashes

Signed-off-by: Martin Storsjö <martin@martin.st>
h263dec: Remove broken and disabled debug cruft
Remove commented-out #includes
mpegvideo: Remove commented-out PARANOID debug cruft
jpegls: cosmetics: Drop some unnecessary parentheses
jpegls: K&R formatting cosmetics

Signed-off-by: Diego Biurrun <diego@biurrun.de>
Remove commented-out debug #define cruft
vf_aspect: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_blackframe: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_boxblur: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_crop: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_crop: cosmetics, break lines
vf_cropdetect: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_delogo: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_drawbox: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_drawtext: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_fade: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.
vf_fieldorder: cosmetics, remove an extra linebreak
vf_fieldorder: use the name 's' for the pointer to the private context

This is shorter and consistent across filters.