Fetch libexif 0.6.21 to include the security fixes.

libexif/sources/libexif/exif-utils.h

 /*! \file exif-utils.h
  *  \brief EXIF data manipulation functions and types 
  */
 /*
  * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 14 matching lines @@
 
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
 #include <libexif/exif-byte-order.h>
 #include <libexif/exif-format.h>
 #include <libexif/_stdint.h>
 #include "config.h"
 
-
 /* If these definitions don't work for you, please let us fix the 
  * macro generating _stdint.h */
-
+        
 /*! EXIF Unsigned Byte data type */
 typedef unsigned char   ExifByte;          /* 1 byte  */
         
 /*! EXIF Signed Byte data type */
 typedef signed char     ExifSByte;         /* 1 byte  */
         
 /*! EXIF Text String data type */
 typedef char *          ExifAscii;
         
 /*! EXIF Unsigned Short data type */
@@ skipping 137 matching lines @@
 /* For compatibility with older versions */
 
 /*! \deprecated Use EXIF_TAG_SUB_SEC_TIME instead. */
 #define EXIF_TAG_SUBSEC_TIME EXIF_TAG_SUB_SEC_TIME
 
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
 
 #endif /* __EXIF_UTILS_H__ */