[libpng16] Fixed error checking in the simplified write API (Olaf van der Spek)

ANNOUNCE

 
-Libpng 1.6.0beta32 - November 14, 2012
+Libpng 1.6.0beta32 - November 15, 2012
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -545,10 +545,11 @@ Version 1.6.0beta31 [November 1, 2012]
     gain; implementing full ICC color correction may be desireable but is left
     up to applications.
 
-Version 1.6.0beta32 [November 14, 2012]
+Version 1.6.0beta32 [November 15, 2012]
   Fixed an intermittent SEGV in pngstest due to an uninitialized array element.
   Added the ability for contrib/libtests/makepng.c to make a PNG with just one
     color. This is useful for debugging pngstest color inaccuracy reports.
+  Fixed error checking in the simplified write API (Olaf van der Spek)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CHANGES

@@ -4297,10 +4297,11 @@ Version 1.6.0beta31 [November 1, 2012]
     gain; implementing full ICC color correction may be desireable but is left
     up to applications.
 
-Version 1.6.0beta32 [November 14, 2012]
+Version 1.6.0beta32 [November 15, 2012]
   Fixed an intermittent SEGV in pngstest due to an uninitialized array element.
   Added the ability for contrib/libtests/makepng.c to make a PNG with just one
     color. This is useful for debugging pngstest color inaccuracy reports.
+  Fixed error checking in the simplified write API (Olaf van der Spek)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

pngwrite.c

@@ -1595,7 +1595,7 @@ png_image_write_init(png_imagep image)
       png_destroy_write_struct(&png_ptr, NULL);
    }
 
-   return png_image_error(image, "png_image_read: out of memory");
+   return png_image_error(image, "png_image_write_: out of memory");
 }
 
 /* Arguments to png_image_write_main: */
@@ -2212,7 +2212,7 @@ png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit,
    const void *buffer, png_int_32 row_stride, const void *colormap)
 {
    /* Write the image to the given (FILE*). */
-   if (image != NULL || image->version != PNG_IMAGE_VERSION)
+   if (image != NULL && image->version == PNG_IMAGE_VERSION)
    {
       if (file != NULL)
       {
@@ -2262,7 +2262,7 @@ png_image_write_to_file(png_imagep image, const char *file_name,
    const void *colormap)
 {
    /* Write the image to the named file. */
-   if (image != NULL || image->version != PNG_IMAGE_VERSION)
+   if (image != NULL && image->version == PNG_IMAGE_VERSION)
    {
       if (file_name != NULL)
       {