Revised error handling

- Functions warn() and die() replaced by GNU-like error(3) function
- Register cleanup() with atexit(3)
- Functions called by cleanup() are marked with CLEANUP and are not allowed to
  call exit(3)

1 files changed, 1 insertions, 1 deletions

diff --git a/image.h b/image.h
index 35c0d71..8932fdf 100644
--- a/image.h
+++ b/image.h
@@ -69,7 +69,7 @@ typedef struct {
 void img_init(img_t*, win_t*);
 
 bool img_load(img_t*, const fileinfo_t*);
-void img_close(img_t*, bool);
+CLEANUP void img_close(img_t*, bool);
 
 void img_render(img_t*);