blake2s: fix frame size of hashBlocksSSE4

The frame is actually 16 bytes plus alignment, not 0.

This fixes the build on Go 1.6.

Change-Id: Id3dcf4e1628791ed55a38a819dcf3c11ecc2f488
Reviewed-on: https://go-review.googlesource.com/31711
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
1 file changed