bug#6606: 23.2; cal-tex-cursor-month incorrect when calendar-week-start-day is 1 (monday)

[Vagn Johansen]

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

emacs -Q
customize calendar-week-start-day to 1 (via customize interface)
M-x calendar RET
C-2 t m
Save generated tex buffer to a file and run pdflatex on it
Use xpdf (or whatever) to see pdf
Result: 1 Aug 2010 is shown in a new line when it should remain on
       the previous line. Also it becomes a monday when it should
       stay as sunday on the previous line.



In GNU Emacs 23.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.12.12)
 of 2010-06-29 on condor
Windowing system distributor `Sun Microsystems, Inc.', version  
11.0.70200000
configured using `configure  '--with-x-toolkit=gtk''

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: en_GB.UTF-8
 value of $LC_CTYPE: en_GB.UTF-8
 value of $LC_MESSAGES: en_GB.UTF-8
 value of $LC_MONETARY: en_GB.UTF-8
 value of $LC_NUMERIC: en_GB.UTF-8
 value of $LC_TIME: en_GB.UTF-8
 value of $LANG: en_GB.UTF-8
 value of $XMODIFIERS: nil
 locale-coding-system: utf-8-unix
 default enable-multibyte-characters: t

Major mode: LaTeX

Minor modes in effect:
 shell-dirtrack-mode: t
 tooltip-mode: t
 mouse-wheel-mode: t
 tool-bar-mode: t
 menu-bar-mode: t
 file-name-shadow-mode: t
 global-font-lock-mode: t
 font-lock-mode: t
 blink-cursor-mode: t
 auto-encryption-mode: t
 auto-compression-mode: t
 line-number-mode: t
 transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> M-x c a l e <tab>
<return> C-2 t m C-x C-w <down> <up> <M-backspace>
b u g . <backspace> <M-backspace> t m p . <backspace>
/ b u g . t e x <return> <help-echo> <help-echo> <help-echo>
<down-mouse-1> <mouse-1> M-x C-g <down-mouse-1> <mouse-1>
C-h v c a l e <tab> w e e <tab> <return> C-x o <tab>
<tab> <tab> <tab> <return> C-x 1 <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <end>
<backspace> 1 <help-echo> <down-mouse-1> <mouse-1>
<help-echo> <down-mouse-1> <help-echo> M-x c a l e
<tab> <return> C-2 t m C-x C-w <down> <left> <left>
<left> <up> <up> <left> <left> <left> <left> 2 <return>
<down-mouse-1> <mouse-1> M-x e m a c s - s u <tab>
<backspace> <M-backspace> <M-backspace> s u b <tab>
C-g M-x e m a c s - r e <tab> <backspace> <backspace>
<M-backspace> e r <backspace> <backspace> r e <tab>
p o <tab> r <tab> <return>

Recent messages:
mouse-2, RET: describe this function [2 times]
mouse-2, RET: customize variable
Creating customization items...
Creating customization items ...done
Resetting customization items...done
Creating customization setup...done
Saving file /u/vj/tmp/bug2.tex...
Wrote /u/vj/tmp/bug2.tex
Quit
Making completion list... [2 times]

Load-path shadows:
None found.

Features:
(shadow sort mail-extr message sendmail ecomplete rfc822 mml mml-sec
password-cache mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231
rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util netrc
time-date mm-util mail-prsvr gmm-utils mailheader canlock sha1 hex-util
hashcash mail-utils emacsbug cus-edit cus-start cus-load wid-edit pp
help-mode view help-fns latexenc tex-mode compile shell comint ring
cal-china lunar solar cal-dst cal-bahai cal-islam cal-hebrew holidays
hol-loaddefs cal-tex mule-util cal-move regexp-opt cal-menu easymenu
calendar cal-loaddefs tooltip ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd font-setting tool-bar dnd fontset image fringe lisp-mode
register page menu-bar rfn-eshadow timer select scroll-bar mldrag mouse
jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
loaddefs button minibuffer faces cus-face files text-properties overlay
md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process
font-render-setting gtk x-toolkit x multi-tty emacs)