Quicktime: kill warnings for Win32

modules/codec/quicktime.c

@@ -80,7 +80,9 @@ static int           OpenAudio( decoder_t * );
 static int           OpenVideo( decoder_t * );
 
 static aout_buffer_t *DecodeAudio( decoder_t *, block_t ** );
+#ifndef WIN32
 static picture_t     *DecodeVideo( decoder_t *, block_t ** );
+#endif
 
 #define FCC( a, b , c, d ) \
     ((uint32_t)( ((a)<<24)|((b)<<16)|((c)<<8)|(d)))
@@ -214,7 +216,9 @@ static const int pi_channels_maps[6] =
 };
 
 static int QTAudioInit( decoder_t * );
+#ifndef WIN32
 static int QTVideoInit( decoder_t * );
+#endif
 
 /*****************************************************************************
  * Open: probe the decoder and return score