Apparently it's possible that MSVC will want to call a built-in function to

 bitshift an Sint64, but it can't find this function since we don't use the
 C runtime on Windows.

Division doesn't have this problem, though. Strange.

  Thanks, Suzuki Masahiro.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402242

src/audio/SDL_audiocvt.c

@@ -140,14 +140,14 @@ SDL_ConvertMono(SDL_AudioCVT * cvt, SDL_AudioFormat format)
                     const Sint64 added =
                         (((Sint64) (Sint32) SDL_SwapBE32(src[0])) +
                          ((Sint64) (Sint32) SDL_SwapBE32(src[1])));
-                    *(dst++) = SDL_SwapBE32((Uint32) ((Sint32) (added >> 1)));
+                    *(dst++) = SDL_SwapBE32((Uint32) ((Sint32) (added / 2)));
                 }
             } else {
                 for (i = cvt->len_cvt / 8; i; --i, src += 2) {
                     const Sint64 added =
                         (((Sint64) (Sint32) SDL_SwapLE32(src[0])) +
                          ((Sint64) (Sint32) SDL_SwapLE32(src[1])));
-                    *(dst++) = SDL_SwapLE32((Uint32) ((Sint32) (added >> 1)));
+                    *(dst++) = SDL_SwapLE32((Uint32) ((Sint32) (added / 2)));
                 }
             }
         }