has_color() performance fixes

Performance profiling showed that multiple strcmpi() calls were
occurring each and every time a character was going to the map.

This update:
- honors the WC_COLOR capability
- It allows a window-port to control individual color availability should the window-port wish to do so.
- Makes checking on the individual colors for the active window-port is a straightforward table lookup at the CLR_ offset.

iflags.use_color remains a master on/off switch for use of color, regardless of the capability
compiled into the game (default TRUE).

The has_color() routine, which is now a shared routine in src/windows.c, could likely be made
into a simple macro to eliminate the function call, but this update does not go that far.

This hits a lot of port files due to the window-port interface change, mostly cookie-cutter.

sys/amiga/winami.c

@@ -28,7 +28,9 @@ long amii_scrnmode;
  * the intuition interface for the amiga...
  */
 struct window_procs amii_procs = {
-    "amii", WC_COLOR | WC_HILITE_PET | WC_INVERSE, 0L, amii_init_nhwindows,
+    "amii", WC_COLOR | WC_HILITE_PET | WC_INVERSE,
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},   /* color availability */
+    0L, amii_init_nhwindows,
     amii_player_selection, amii_askname, amii_get_nh_event,
     amii_exit_nhwindows, amii_suspend_nhwindows, amii_resume_nhwindows,
     amii_create_nhwindow, amii_clear_nhwindow, amii_display_nhwindow,
@@ -60,7 +62,9 @@ struct window_procs amii_procs = {
  * a shared library to allow the executable to be smaller.
  */
 struct window_procs amiv_procs = {
-    "amitile", WC_COLOR | WC_HILITE_PET | WC_INVERSE, 0L, amii_init_nhwindows,
+    "amitile", WC_COLOR | WC_HILITE_PET | WC_INVERSE,
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},   /* color availability */
+    0L, amii_init_nhwindows,
     amii_player_selection, amii_askname, amii_get_nh_event,
     amii_exit_nhwindows, amii_suspend_nhwindows, amii_resume_nhwindows,
     amii_create_nhwindow, amii_clear_nhwindow, amii_display_nhwindow,

sys/mac/macwin.c

@@ -3251,7 +3251,9 @@ struct window_procs mac_procs = {
     WC_COLOR | WC_HILITE_PET | WC_FONT_MAP | WC_FONT_MENU | WC_FONT_MESSAGE
         | WC_FONT_STATUS | WC_FONT_TEXT | WC_FONTSIZ_MAP | WC_FONTSIZ_MENU
         | WC_FONTSIZ_MESSAGE | WC_FONTSIZ_STATUS | WC_FONTSIZ_TEXT,
-    0L, mac_init_nhwindows,
+    0L,
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},   /* color availability */
+    mac_init_nhwindows,
     mac_unimplemented, /* see macmenu.c:mac_askname() for player selection */
     mac_askname, mac_get_nh_event, mac_exit_nhwindows, mac_suspend_nhwindows,
     mac_unimplemented, mac_create_nhwindow, mac_clear_nhwindow,

sys/wince/mswproc.c

@@ -50,6 +50,7 @@ struct window_procs mswin_procs = {
         | WC_TILE_WIDTH | WC_TILE_HEIGHT | WC_TILE_FILE | WC_VARY_MSGCOUNT
         | WC_WINDOWCOLORS | WC_PLAYER_SELECTION,
     WC2_FULLSCREEN | WC2_SOFTKEYBOARD | WC2_WRAPTEXT, mswin_init_nhwindows,
+    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},   /* color availability */
     mswin_player_selection, mswin_askname, mswin_get_nh_event,
     mswin_exit_nhwindows, mswin_suspend_nhwindows, mswin_resume_nhwindows,
     mswin_create_nhwindow, mswin_clear_nhwindow, mswin_display_nhwindow,

sys/winnt/nttty.c

@@ -790,6 +790,7 @@ init_ttycolor()
 }
 #endif /* TEXTCOLOR */
 
+#if 0
 int
 has_color(int color)
 {
@@ -803,6 +804,7 @@ has_color(int color)
     else
         return 0;
 }
+#endif
 
 int
 term_attr_fixup(int attrmask)

sys/winnt/stubs.c

@@ -114,12 +114,6 @@ backsp()
     return;
 }
 
-int
-has_color(int color)
-{
-    return 1;
-}
-
 #ifndef NO_MOUSE_ALLOWED
 void
 toggle_mouse_support()