Respect HAVE_JPEG and build cleanly

BUG=93
TEST=none
Review URL: https://webrtc-codereview.appspot.com/812004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@361 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 360
+Version: 361
 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 360
+#define LIBYUV_VERSION 361
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/convert.cc

@@ -1697,7 +1697,12 @@ int MJPGToI420(const uint8* sample,
 // src_height is used to compute location of planes, and indicate inversion
 // sample_size is measured in bytes and is the size of the frame.
 //   With MJPEG it is the compressed size of the frame.
-int ConvertToI420(const uint8* sample, size_t sample_size,
+int ConvertToI420(const uint8* sample,
+#ifdef HAVE_JPEG
+                  size_t sample_size,
+#else
+                  size_t /* sample_size */,
+#endif
                   uint8* y, int y_stride,
                   uint8* u, int u_stride,
                   uint8* v, int v_stride,