message: Fix SIGFPE on FreeBSD
  FT_Get_Char_Index as per documentation at
  returns 0 in case of an error. It does not return a Freetyp2 error
  code. Thus checking for FT_Err_Ok which is defined to 0 does not make
  any sense.
diff: @@ -399,7 +399,7 @@ namespace // {{{ helper
  FT_Pos maxAdvance = 0;
  for (FT_ULong i = 32; i < 128; i++)
  {
  - if (auto ci = FT_Get_Char_Index(_face, i); ci == FT_Err_Ok)
  + if (auto ci = FT_Get_Char_Index(_face, i); ci != 0)
  if (FT_Load_Glyph(_face, ci, FT_LOAD_DEFAULT) == FT_Err_Ok)
  maxAdvance = max(maxAdvance, _face->glyph->metrics.horiAdvance);
  }
  