This patch changes the code from:
	(FLAC__int32)(xmm.m128i_i64[0] >> lp_quantization)
into:
	_mm_cvtsi128_si32(_mm_srli_epi64(xmm, lp_quantization));

Encoding of 24-bit .wav files with 32-bit FLAC became noticeably faster.

Patch-from: lvqcl <lvqcl.mail@gmail.com>