* Add support for doublewidth characters even if ncurses or SLang don't know

about them.

caca/driver_ncurses.c

@@ -449,7 +449,12 @@ static void ncurses_write_utf32(uint32_t ch)
     buf[bytes] = '\0';
     addstr(buf);
 #else
-    addch(ch < 0x80 ? ch : '?');
+    if(ch < 0x80)
+        addch(ch)
+    else if(cucul_utf32_is_fullwidth(ch))
+        addstr("? ");
+    else
+        addch('?');
 #endif
 }
 

caca/driver_slang.c

@@ -461,7 +461,12 @@ static void slang_write_utf32(uint32_t ch)
     buf[bytes] = '\0';
     SLsmg_write_string(buf);
 #else
-    SLsmg_write_char(ch < 0x80 ? ch : ' ');
+    if(ch < 0x80)
+        SLsmg_write_char(ch)
+    else if(cucul_utf32_is_fullwidth(ch))
+        SLsmg_write_string("? ");
+    else
+        SLsmg_write_char('?');
 #endif
 }