Add terminal hook defined_color_hook

* src/termhooks.h (defined_color_hook): New terminal hook.

* src/xterm.c:
* src/nsterm.m:
* src/term.c:
* src/w32term.c: Set defined_color_hook.

* src/xfaces.c: Use defined_color_hook.
(defined_color): Remove.

* src/image.c: Remove redefinitions of x_defined_color, and use
defined_color_hook.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/term.c b/src/term.c
index 2de0a0e6649..6a8fc2ee932 100644
--- a/src/term.c
+++ b/src/term.c
@@ -3838,6 +3838,7 @@ clear_tty_hooks (struct terminal *terminal)
   terminal->update_begin_hook = 0;
   terminal->update_end_hook = 0;
   terminal->set_terminal_window_hook = 0;
+  terminal->defined_color_hook = 0;
   terminal->mouse_position_hook = 0;
   terminal->frame_rehighlight_hook = 0;
   terminal->frame_raise_lower_hook = 0;
@@ -3881,6 +3882,7 @@ set_tty_hooks (struct terminal *terminal)
   terminal->menu_show_hook = &tty_menu_show;
 #endif
   terminal->set_terminal_window_hook = &tty_set_terminal_window;
+  terminal->defined_color_hook = &tty_defined_color; /* xfaces.c */
   terminal->read_socket_hook = &tty_read_avail_input; /* keyboard.c */
   terminal->delete_frame_hook = &tty_free_frame_resources;
   terminal->delete_terminal_hook = &delete_tty;