bug#64344: [PATCH] Make calculator work with customized mode-line

[john muhl]

calculator.el doesn’t work after customizing the mode-line. It assumes
the line-width is always an integer but after using customize it is a
dotted list.

  - emacs -Q
  - M-x customize-apropos-faces RET mode-line RET
  - Ensure ‘mode-line-face’ has a box property with vertical and
    horizontal widths. The default config includes these already.
  - Set for current session
  - M-x calculator RET
  => calculator: Wrong type argument: number-or-marker-p, (1 . -1)

In GNU Emacs 30.0.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version
 3.24.38, cairo version 1.17.8) of 2023-06-28 built on localhost
Repository revision: c5d6102313076b83526dc79bfb563621671fb70b
Repository branch: master
System Description: Fedora Linux 38 (Workstation Edition)

Configured using:
 'configure --with-native-compilation --with-pgtk'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM GTK3 ZLIB

0001-lisp-calculator-el--calculator-need-3-lines---Ch.patch
Description: [PATCH] * lisp/calculator.el (calculator-need-3-lines): Check type

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