Ticket #4200: fix FTBFS with ncurses build with --disable-widec.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

lib/tty/tty-ncurses.c

@@ -560,6 +560,7 @@ tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
 void
 tty_colorize_area (int y, int x, int rows, int cols, int color)
 {
+#ifdef ENABLE_SHADOWS
     cchar_t *ctext;
     wchar_t wch[10];            /* TODO not sure if the length is correct */
     attr_t attrs;
@@ -585,6 +586,13 @@ tty_colorize_area (int y, int x, int rows, int cols, int color)
     }
 
     g_free (ctext);
+#else
+    (void) y;
+    (void) x;
+    (void) rows;
+    (void) cols;
+    (void) color;
+#endif /* ENABLE_SHADOWS */
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tty/tty-ncurses.h

@@ -30,6 +30,11 @@
 #define NCURSES_CONST const
 #endif
 
+/* do not draw shadows if NCurses is built with --disable-widec */
+#if defined(NCURSES_WIDECHAR) && NCURSES_WIDECHAR
+#define ENABLE_SHADOWS 1
+#endif
+
 /*** typedefs(not structures) and defined constants **********************************************/
 
 /*** enums ***************************************************************************************/

lib/tty/tty-slang.h

@@ -23,6 +23,8 @@
 #define COLS  SLtt_Screen_Cols
 #define LINES SLtt_Screen_Rows
 
+#define ENABLE_SHADOWS 1
+
 /*** enums ***************************************************************************************/
 
 enum

src/filemanager/boxes.c

@@ -280,7 +280,9 @@ appearance_box_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm
     switch (msg)
     {
     case MSG_INIT:
+#ifdef ENABLE_SHADOWS
         if (!tty_use_colors ())
+#endif
         {
             Widget *shadow;