INTERP_BICUBIC instead of INTERP_BILINEAR

More suitable fix for the issue #23 (line artifacts, only on linux with native mediaLib):

INTERP_BILINEAR causes the bug here, though with INTERP_BICUBIC_2, INTERP_BICUBIC or INTERP_NEAREST there is no problem. I think it is better to use one of latter methods than just commenting out.