Neon does 8 at a time, so a check is added for any function of I422ToBGRA that…

Neon does 8 at a time, so a check is added for any function of I422ToBGRA that width is >= 8 and for fast path that it is a multiple of 8 not 16.
BUG=373
TESTED=untested
R=brucedawson@google.com

Review URL: https://webrtc-codereview.appspot.com/24059004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1126 16f28f9a-4ce2-e073-06de-1de4eb20be90

source/planar_functions.cc

@@ -794,9 +794,9 @@ int I422ToBGRA(const uint8* src_y, int src_stride_y,
     src_stride_y = src_stride_u = src_stride_v = dst_stride_bgra = 0;
   }
 #if defined(HAS_I422TOBGRAROW_NEON)
-  if (TestCpuFlag(kCpuHasNEON)) {
+  if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
     I422ToBGRARow = I422ToBGRARow_Any_NEON;
-    if (IS_ALIGNED(width, 16)) {
+    if (IS_ALIGNED(width, 8)) {
       I422ToBGRARow = I422ToBGRARow_NEON;
     }
   }