[libpng16] Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf()

  in pngwrite.c, and made various other fixes to png_write_eXIf().
Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif
  to arguments for png_get_eXIf() and png_set_eXIf().

1 files changed, 2 insertions, 11 deletions

diff --git a/pngwutil.c b/pngwutil.c
index 348bb524d..d0884175a 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1479,24 +1479,15 @@ void /* PRIVATE */
 png_write_eXIf(png_structrp png_ptr, png_bytep exif, int num_exif)
 {
    int i;
-   png_byte buf[3];
+   png_byte buf[1];
 
    png_debug(1, "in png_write_eXIf");
 
-   if (num_exif > (int)png_ptr->num_exif)
-   {
-      png_debug2(3, "num_exif = %d, png_ptr->num_exif = %d", num_exif,
-          png_ptr->num_exif);
-
-      png_warning(png_ptr, "Invalid number of exif bytes specified");
-      return;
-   }
-
    png_write_chunk_header(png_ptr, png_eXIf, (png_uint_32)(num_exif));
 
    for (i = 0; i < num_exif; i++)
    {
-      buf[i] = exif[i];
+      buf[0] = exif[i];
       png_write_chunk_data(png_ptr, buf, (png_size_t)1);
    }