sha: add missing include

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22449 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavutil/sha.c

@@ -22,6 +22,7 @@
  */
 
 #include <string.h>
+#include "avutil.h"
 #include "bswap.h"
 #include "sha.h"
 #include "sha1.h"