TTY: don't check use_colors twice.

start_color() is NCurses function. Don't call it in S-Lang TTY layer. Define
is removed.

src/tty/color-ncurses.c

@@ -47,6 +47,7 @@ tty_init_colors (void)
 
 	start_color ();
 	use_default_colors ();
+
 	configure_colors ();
 
 	if (map_len > MAX_PAIRS) {
@@ -56,10 +57,8 @@ tty_init_colors (void)
 	    exit (1);
 	}
 
-	if (use_colors) {
 	/* Use default terminal colors */
 	mc_init_pair (DEFAULT_COLOR_INDEX, -1, -1);
-	}
 
 	for (i = 0; i < map_len; i++)
 	    if (color_map [i].name != NULL) {

src/tty/color-slang.c

@@ -101,10 +101,8 @@ tty_init_colors (void)
 	const size_t map_len = color_map_len ();
 	size_t i;
 
-	start_color ();
 	configure_colors ();
 
-	if (use_colors) {
 	/*
 	 * We are relying on undocumented feature of
 	 * S-Lang to make COLOR_PAIR(DEFAULT_COLOR_INDEX)
@@ -113,7 +111,6 @@ tty_init_colors (void)
 	 * document this feature.
 	 */
 	SLtt_set_color (DEFAULT_COLOR_INDEX, NULL, (char *) "default", (char *) "default");
-	}
 
 	for (i = 0; i < map_len; i++)
 	    if (color_map [i].name != NULL)

src/tty/tty-slang.h

@@ -44,7 +44,6 @@ enum {
 #define keypad(scr, value)	slang_keypad (value)
 
 #define ungetch(x)		SLang_ungetkey (x)
-#define start_color()
 #define touchwin(x)		SLsmg_touch_lines (0, LINES)
 #define reset_shell_mode()	slang_shell_mode ()
 #define reset_prog_mode()	slang_prog_mode ()