Fix testi420 unittest for odd height

When the image height for unittests was set to an
odd height, the TestI420 unittest would not fill
the complete source buffer.  This change handles
the odd height test case.
No change to library code.

TBR=harryjin@google.com
BUG=libyuv:549

Review URL: https://codereview.chromium.org/1609103002 .

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1567
+Version: 1568
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1567
+#define LIBYUV_VERSION 1568
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

unit_test/color_test.cc

@@ -81,7 +81,19 @@ namespace libyuv {
     }                                                                          \
     p += HN;                                                                   \
   }                                                                            \
-                                                                               \
+  if ((benchmark_height_ & 1) && HS == 2) {                                    \
+    for (int x = 0; x < benchmark_width_ - 1; x += 2) {                        \
+      uint8 r = static_cast<uint8>(fastrand());                                \
+      p[0] = r;                                                                \
+      p[1] = r;                                                                \
+      p += 2;                                                                  \
+    }                                                                          \
+    if (benchmark_width_ & 1) {                                                \
+      uint8 r = static_cast<uint8>(fastrand());                                \
+      p[0] = r;                                                                \
+      p += 1;                                                                  \
+    }                                                                          \
+  }                                                                            \
   /* Start with YUV converted to ARGB. */                                      \
   YUVTOARGB(orig_y, benchmark_width_,                                          \
             orig_u, (benchmark_width_ + 1) / 2,                                \