() Stefan Monnier <monnier@iro.umontreal.ca>
() Tue, 29 Apr 2014 01:39:39 -0400

   > +    return 1;
   > +  return 0; 

   Please make the return type "bool", then.  And use "true" and "false"
   rather than 1 and 0.  Also, you can apply eta-reduction to the above
   code and just write

  return (XftCharExists (xftfont_info->display, xftfont_info->xftfont, 0x4E00)
          || XftCharExists (xftfont_info->display, xftfont_info->xftfont, 0xAC00));

   [ Tho that would step over the 80 columns limit, so you may then want to
     introduce a local var to hold xftfont_info->display, maybe.  ]

Another wrinkle is func ‘XftCharExists’ returns ‘FcBool’, so to be
excruciatingly correct, we would want to compare each call's rv against
‘FcTrue’, something like: