bug#22538: 25.1.50; x-popup-menu not working in tty

[Helmut Eller]

When executing this:
 emacs -Q -nw \
   -eval '(x-popup-menu t `("Menu" ("Pane" ("Item1" . 1) ("Item2" . 1))))'

Emacs doesn't display a menu as it should but instead prints this error
message:
   Wrong type argument: integerp, :stopbits




In GNU Emacs 25.1.50.3 (i686-pc-linux-gnu, GTK+ Version 3.14.5)
 of 2016-01-29 built on ix
Repository revision: 487bd7aedf9bbbf0b939b653912253fbeb7d16b9
System Description:     Debian GNU/Linux 8.0 (jessie)

Configured using:
 'configure --with-jpeg=no --with-gif=no --with-tiff=no'

Configured features:
XPM PNG RSVG SOUND DBUS GSETTINGS NOTIFY LIBXML2 FREETYPE XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: C.UTF-8
  locale-coding-system: utf-8-unix