filters: GP_ResizeLinearLF: Templatize.
filters: GP_ResizeLinearLF: Templatize.

This templatizes the linear resampling with low pass.

The sampling by x is now template macro, which forced
inlining of the code which produces three times faster code.

Signed-off-by: Cyril Hrubis <b1e90efd3b808b8e0bcf2a9a55fd8b9a779bfd81@ucw.cz>

gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim