Ticket #39989: patch-src-hpgsimage.c.diff

src/

@@ -34 +34 @@
 #include <hpgsimage.h>
 #include <math.h>
 #include <errno.h>
-#include <libpng12/png.h>
+#include <libpng15/png.h>
 
 /*! \defgroup image The public pixel image API.
 
@@ -704 +704 @@
   hpgs_log(hpgs_i18n("libpng warning: %s.\n"),str);
 }
 
+/* libpng 1.4 dropped definitions of png_infopp_NULL and int_p_NULL. So add:- */
+#define png_infopp_NULL (png_infopp)NULL
+#define int_p_NULL (int*)NULL
 static  int pim_write(hpgs_image *_this,
                       const char *filename)
 {