Clean up posix build of YUY2
BUG=76
TEST=build on osx/linux
Review URL: https://webrtc-codereview.appspot.com/762006

git-svn-id: http://libyuv.googlecode.com/svn/trunk@335 16f28f9a-4ce2-e073-06de-1de4eb20be90
diff --git a/source/row_posix.cc b/source/row_posix.cc
index 3059346..609e7dc 100644
--- a/source/row_posix.cc
+++ b/source/row_posix.cc
@@ -2219,8 +2219,7 @@
 
 void YUY2ToUVRow_Unaligned_SSE2(const uint8* src_yuy2,
                                 int stride_yuy2,
-                                uint8* dst_u, uint8* dst_y,
-                                int pix) {
+                                uint8* dst_u, uint8* dst_v, int pix) {
   asm volatile (
     "pcmpeqb   %%xmm5,%%xmm5                   \n"
     "psrlw     $0x8,%%xmm5                     \n"