[gdk-pixbuf] Use png_jmpbuf macro

[Jon Nordby <jonnor src gnome org>]

commit e6a5b2472a4a5d554b587dfcb798b95035caa6fd
Author: Maarten Bosmans <mkbosmans gmail com>
Date:   Mon Jan 24 11:39:22 2011 +0100

    Use png_jmpbuf macro
    
    This makes the png loader compatible with libpng 1.5

 gdk-pixbuf/io-png.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gdk-pixbuf/io-png.c b/gdk-pixbuf/io-png.c
index 79c81fd..76f3304 100644
--- a/gdk-pixbuf/io-png.c
+++ b/gdk-pixbuf/io-png.c
@@ -183,7 +183,7 @@ png_simple_error_callback(png_structp png_save_ptr,
                              error_msg);
         }
 
-        longjmp (png_save_ptr->jmpbuf, 1);
+        longjmp (png_jmpbuf(png_save_ptr), 1);
 }
 
 static void
@@ -287,7 +287,7 @@ gdk_pixbuf__png_image_load (FILE *f, GError **error)
 		return NULL;
 	}
 
-	if (setjmp (png_ptr->jmpbuf)) {
+	if (setjmp (png_jmpbuf(png_ptr))) {
 	    	g_free (rows);
 
 		if (pixbuf)
@@ -459,7 +459,7 @@ gdk_pixbuf__png_image_begin_load (GdkPixbufModuleSizeFunc size_func,
                 return NULL;
         }
         
-	if (setjmp (lc->png_read_ptr->jmpbuf)) {
+	if (setjmp (png_jmpbuf(lc->png_read_ptr))) {
 		if (lc->png_info_ptr)
 			png_destroy_read_struct(&lc->png_read_ptr, NULL, NULL);
                 g_free(lc);
@@ -531,7 +531,7 @@ gdk_pixbuf__png_image_load_increment(gpointer context,
         lc->error = error;
         
         /* Invokes our callbacks as needed */
-	if (setjmp (lc->png_read_ptr->jmpbuf)) {
+	if (setjmp (png_jmpbuf(lc->png_read_ptr))) {
                 lc->error = NULL;
 		return FALSE;
 	} else {
@@ -769,7 +769,7 @@ png_error_callback(png_structp png_read_ptr,
                              error_msg);
         }
 
-        longjmp (png_read_ptr->jmpbuf, 1);
+        longjmp (png_jmpbuf(png_read_ptr), 1);
 }
 
 static void
@@ -978,7 +978,7 @@ static gboolean real_save_png (GdkPixbuf        *pixbuf,
 	       success = FALSE;
 	       goto cleanup;
        }
-       if (setjmp (png_ptr->jmpbuf)) {
+       if (setjmp (png_jmpbuf(png_ptr))) {
 	       success = FALSE;
 	       goto cleanup;
        }