Convert Free_Pixmap macro into terminal hook

* src/termhooks.h (terminal) [HAVE_WINDOW_SYSTEM]: New terminal hook
free_pixmap.

* src/image.c: Replace Free_Pixmap with free_pixmap.

* src/msdos.h (FRAME_X_DISPLAY):
* src/nsgui.h (Display):
* src/nsterm.h (FRAME_NS_DISPLAY, FRAME_X_DISPLAY, FRAME_X_SCREEN)
(FRAME_X_VISUAL):
* src/w32term.h (FRAME_X_DISPLAY): Remove unused X-compatibility
macros and typedefs.

* src/nsterm.m:
* src/w32term.c:
* src/xterm.c: Implement and set free_pixmap hook.

1 files changed, 0 insertions, 3 deletions

diff --git a/src/w32term.h b/src/w32term.h
index de372d7e5d7..a03b9fd3311 100644
--- a/src/w32term.h
+++ b/src/w32term.h
@@ -420,9 +420,6 @@ extern struct w32_output w32term_display;
 /* This gives the w32_display_info structure for the display F is on.  */
 #define FRAME_DISPLAY_INFO(f) ((void) (f), (&one_w32_display_info))
 
-/* This is the `Display *' which frame F is on.  */
-#define FRAME_X_DISPLAY(f) (0)
-
 #define FRAME_NORMAL_PLACEMENT(F) ((F)->output_data.w32->normal_placement)
 #define FRAME_PREV_FSMODE(F)      ((F)->output_data.w32->prev_fsmode)