XFA: Upgrade to libtiff 4.0.6.

third_party/libtiff/tif_dirwrite.c

-/* $Id: tif_dirwrite.c,v 1.77 2012-07-06 19:18:31 bfriesen Exp $ */
+/* $Id: tif_dirwrite.c,v 1.78 2015-05-31 00:38:46 bfriesen Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
  *
  * Permission to use, copy, modify, distribute, and sell this software and
  * its documentation for any purpose is hereby granted without fee, provided
  * that (i) the above copyright notices and this permission notice appear in
  * all copies of the software and related documentation, and (ii) the names of
  * Sam Leffler and Silicon Graphics may not be used in any advertising or
@@ skipping 2820 matching lines @@
     if( !value_in_entry )
     {
         entry_offset = TIFFSeekFile(tif,0,SEEK_END);
         
         if (!WriteOK(tif, buf_to_write, count*TIFFDataWidth(datatype))) {
             _TIFFfree( buf_to_write );
             TIFFErrorExt(tif->tif_clientdata, module,
                          "Error writing directory link");
             return (0);
         }
-        
-        _TIFFfree( buf_to_write );
     }
     else
     {
         memcpy( &entry_offset, buf_to_write, count*TIFFDataWidth(datatype));
     }
 
+    _TIFFfree( buf_to_write );
+    buf_to_write = 0;
+
 /* -------------------------------------------------------------------- */
 /*      Adjust the directory entry.                                     */
 /* -------------------------------------------------------------------- */
     entry_type = datatype;
     memcpy( direntry_raw + 2, &entry_type, sizeof(uint16) );
     if (tif->tif_flags&TIFF_SWAB)
         TIFFSwabShort( (uint16 *) (direntry_raw + 2) );
 
     if (!(tif->tif_flags&TIFF_BIGTIFF))
     {
@@ skipping 41 matching lines @@
     return 1;
 }
 /* vim: set ts=8 sts=8 sw=8 noet: */
 /*
  * Local Variables:
  * mode: c
  * c-basic-offset: 8
  * fill-column: 78
  * End:
  */