bug#11174: 24.0.94; regression: mouse-2 in *Help* error: "No cross-reference here"

[Drew Adams]

emacs -Q
 
C-h f customize-apropos
 
Click mouse-2 on the `cus-edit.el' link.  Do not select the *Help*
window first.  This error is raised: "No cross-reference here".
 
Click the link again, and the link is followed.  It is only the first
click (each time *Help* is created) that is bugged.  There is no such
bug for a mouse-1 click on the link.
 
If you first click mouse-1 in the *Help* buffer, then the first mouse-2
click works.  A mouse-2 click without first selecting the *Help* window
is bugged.
 
This is a regression wrt Emacs 23 (and 22...).

In GNU Emacs 24.0.94.1 (i386-mingw-nt5.1.2600)
 of 2012-03-19 on MARVIN
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.6) --no-opt --enable-checking --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include'