diff -up BlockOutII-2.3/contrib/ImageLib/src/png/hpng.c~ BlockOutII-2.3/contrib/ImageLib/src/png/hpng.c

--- BlockOutII-2.3/ImageLib/src/png/hpng.c~	2011-12-14 11:07:35.000000000 +0100

+++ BlockOutII-2.3/ImageLib/src/png/hpng.c	2011-12-14 11:09:53.542044115 +0100

@@ -45,7 +45,7 @@ int LoadPngImage(PNG_IMAGE *d) {

 	// ---------------- Error handling

 	png_set_error_fn(png,NULL,my_png_error,NULL);

-  if (setjmp(png->jmpbuf)) {

+  if (setjmp(png_jmpbuf(png))) {

  	  png_destroy_read_struct(&png, &info, &endinfo);

 	  return 0;

 	}

@@ -154,7 +154,7 @@ char *WritePngImage(char *file_name,unsi

    {

     	sprintf(PngErrorMessage,"png_create_info_struct() failed");

       fclose(fp);

-      png_destroy_write_struct(&png_ptr,  png_infopp_NULL);

+      png_destroy_write_struct(&png_ptr, &info_ptr);

       return PngErrorMessage;

    }