pkg/44940: links-gui crashes due to libpng fixed-point overflow

[jdbaker%mylinuxisp.com@localhost]

>Number:         44940
>Category:       pkg
>Synopsis:       links-gui crashes due to libpng fixed-point overflow
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 06 11:10:00 +0000 2011
>Originator:     John D. Baker
>Release:        i386-5.99.51, pkgsrc-current
>Organization:
>Environment:
NetBSD skuld.technoskunk.fur 5.99.51  NetBSD 5.99.51 (SKULD) #4: Tue Apr 26 
22:07:48 CDT 2011  
sysop%skuld.technoskunk.fur@localhost:/d0/build/current/obj/i386/sys/arch/i386/compile/SKULD
 i386
>Description:
Attemping to load some web pages, such as the "pkgsrc-users" mail
archive page crashes www/links-gui when running in GUI mode (-g).

~/.xsession-errors reports:

Error when loading compiled-in font: fixed point overflow in rgb to gray green 
coefficient.
libpng error: fixed point overflow in rgb to gray green coefficient

(pkgsrc-current updated as of approximately 201105061050Z so using
latest libpng-1.5.3beta05)
>How-To-Repeat:
Start www/links-gui in GUI mode:  'links -g http://some.url.here/

Navigate to various web sites, such as livejournal or possibly even

http://mail-index.NetBSD.org/pkgsrc-users/tindex.html

until links crashes.

Observe message at tail of ${HOME}/.xsession-errors, or terminal window
if started from shell.
>Fix: