remove extern "C" from rotate function, since its built with extern "C" around full file.

BUG=341
TESTED=clang -c -Iinclude source/rotate.c
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/17919004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1031 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1030
+Version: 1031
 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 1030
+#define LIBYUV_VERSION 1031
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/rotate.cc

@@ -388,10 +388,10 @@ static void TransposeWx8_SSSE3(const uint8* src, int src_stride,
 
 #if !defined(LIBYUV_DISABLE_X86) && defined(__i386__)
 #define HAS_TRANSPOSE_UVWX8_SSE2
-extern "C" void TransposeUVWx8_SSE2(const uint8* src, int src_stride,
-                                    uint8* dst_a, int dst_stride_a,
-                                    uint8* dst_b, int dst_stride_b,
-                                    int w);
+void TransposeUVWx8_SSE2(const uint8* src, int src_stride,
+                         uint8* dst_a, int dst_stride_a,
+                         uint8* dst_b, int dst_stride_b,
+                         int w);
   asm (
     DECLARE_FUNCTION(TransposeUVWx8_SSE2)
     "push   %ebx                               \n"