LED Meter: display wide characters and restore non-wide ncurses support

Print wide characters, like degree sign, properly via mvadd_wch().
Ignore attributes when returning value from RichString_getCharVal() in
non-wide ncurses mode to test against raw characters.

Meter.c

@@ -414,10 +414,15 @@ static void LEDMeterMode_draw(Meter* this, int x, int y, int w) {
    for (int i = 0; i < len; i++) {
       int c = RichString_getCharVal(out, i);
       if (c >= '0' && c <= '9') {
-         LEDMeterMode_drawDigit(xx, y, c - 48);
+         LEDMeterMode_drawDigit(xx, y, c - '0');
          xx += 4;
       } else {
+#ifdef HAVE_LIBNCURSESW
+         out.chptr[i].attr = 0; /* use LED_COLOR from attrset() */
+         mvadd_wch(yText, xx, &out.chptr[i]);
+#else
          mvaddch(yText, xx, c);
+#endif
          xx += 1;
       }
    }

RichString.h

@@ -22,13 +22,13 @@ in the source distribution for its full text.
 #ifdef HAVE_LIBNCURSESW
 #define RichString_printVal(this, y, x) mvadd_wchstr(y, x, (this).chptr)
 #define RichString_printoffnVal(this, y, x, off, n) mvadd_wchnstr(y, x, (this).chptr + (off), n)
-#define RichString_getCharVal(this, i) ((this).chptr[i].chars[0] & 255)
+#define RichString_getCharVal(this, i) ((this).chptr[i].chars[0])
 #define RichString_setChar(this, at, ch) do { (this)->chptr[(at)] = (CharType) { .chars = { ch, 0 } }; } while (0)
 #define CharType cchar_t
 #else
 #define RichString_printVal(this, y, x) mvaddchstr(y, x, (this).chptr)
 #define RichString_printoffnVal(this, y, x, off, n) mvaddchnstr(y, x, (this).chptr + (off), n)
-#define RichString_getCharVal(this, i) ((this).chptr[i])
+#define RichString_getCharVal(this, i) ((this).chptr[i] & 0xff)
 #define RichString_setChar(this, at, ch) do { (this)->chptr[(at)] = ch; } while (0)
 #define CharType chtype
 #endif