core: add pointer in some callbacks (closes #406)

This pointer is the first argument received by callbacks, and the
existing argument "data" is now automatically freed by WeeChat when the
object containing the callback is removed.

With this new pointer, the linked list of callbacks in scripts has been
removed. This will improve speed of scripts (using a lot of hooks),
reduce memory used by scripts and reduce time to unload scripts.

Following functions are affected in the C API:

* exec_on_files
* config_new
* config_new_section
* config_new_option
* hook_command
* hook_command_run
* hook_timer
* hook_fd
* hook_process
* hook_process_hashtable
* hook_connect
* hook_print
* hook_signal
* hook_hsignal
* hook_config
* hook_completion
* hook_modifier
* hook_info
* hook_info_hashtable
* hook_infolist
* hook_hdata
* hook_focus
* unhook_all_plugin
* buffer_new
* bar_item_new
* upgrade_new
* upgrade_read

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/curses/gui-curses.h b/src/gui/curses/gui-curses.h
index 43d80bfbb..cbf162c27 100644
--- a/src/gui/curses/gui-curses.h
+++ b/src/gui/curses/gui-curses.h
@@ -98,7 +98,7 @@ extern void gui_chat_calculate_line_diff (struct t_gui_window *window,
 
 /* key functions */
 extern void gui_key_default_bindings (int context);
-extern int gui_key_read_cb (void *data, int fd);
+extern int gui_key_read_cb (const void *pointer, void *data, int fd);
 
 /* window functions */
 extern void gui_window_read_terminal_size ();