diff -up zvbi-0.2.33/src/exp-gfx.c~ zvbi-0.2.33/src/exp-gfx.c
--- zvbi-0.2.33/src/exp-gfx.c~ 2008-02-24 15:17:47.000000000 +0100
+++ zvbi-0.2.33/src/exp-gfx.c 2011-12-06 13:40:25.218139962 +0100
@@ -1672,11 +1672,11 @@ write_png (gfx_instance * gfx,
char title[80];
unsigned int i;
- if (setjmp (png_ptr->jmpbuf))
+ if (png_jmpbuf (png_ptr))
return FALSE;
png_set_write_fn (png_ptr,
- (voidp) gfx,
+ gfx,
write_data,
flush_data);