change all pix parameters to width for consistency

source/convert_from.cc

 /*
  *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1023 matching lines @@
                        uint8* dst_rgb565, int dst_stride_rgb565,
                        const uint8* dither4x4, int width, int height) {
   int y;
   void (*I422ToARGBRow)(const uint8* y_buf,
                         const uint8* u_buf,
                         const uint8* v_buf,
                         uint8* rgb_buf,
                         const struct YuvConstants* yuvconstants,
                         int width) = I422ToARGBRow_C;
   void (*ARGBToRGB565DitherRow)(const uint8* src_argb, uint8* dst_rgb,
-      const uint32 dither4, int pix) = ARGBToRGB565DitherRow_C;
+      const uint32 dither4, int width) = ARGBToRGB565DitherRow_C;
   if (!src_y || !src_u || !src_v || !dst_rgb565 ||
       width <= 0 || height == 0) {
     return -1;
   }
   // Negative height means invert the image.
   if (height < 0) {
     height = -height;
     dst_rgb565 = dst_rgb565 + (height - 1) * dst_stride_rgb565;
     dst_stride_rgb565 = -dst_stride_rgb565;
   }
@@ skipping 294 matching lines @@
     default:
       return -1;  // unknown fourcc - return failure code.
   }
   return r;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif