pkg/53772: gtk2 fails to recognize png file during build

[alexwgarvin%gmail.com@localhost]

>Number:         53772
>Category:       pkg
>Synopsis:       gtk2 fails to recognize png file during build
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 10 16:20:00 +0000 2018
>Originator:     Alexander Garvin
>Release:        pkgsrc-current 2018-12-10
>Organization:
>Environment:
Linux -- 4.19.5-300.fc29.x86_64 #1 SMP Tue Nov 27 19:29:23 UTC 2018 x86_64 GNU/Linux
>Description:
gtk2 fails to recognize file format for apple-red.png. Possibly the same issue as:
http://mail-index.netbsd.org/pkgsrc-bugs/2009/08/28/msg033613.html
I tried updating/rebuilding libpng (graphics/png) but still ran into the same issue.


Making all in demos
make[2]: Entering directory '/usr/pkgsrc/x11/gtk2/work/gtk+-2.24.32/demos'
/usr/pkg/bin/gdk-pixbuf-csource --raw --build-list		\
        apple_red  ./apple-red.png	\
                gnome_foot ./gnome-foot.png	\
        > test-inline-pixbufs.h				\
|| (rm -f test-inline-pixbufs.h && false)
failed to load "./apple-red.png": Couldn?t recognize the image file format for file ?./apple-red.png?
Makefile:1018: recipe for target 'test-inline-pixbufs.h' failed
make[2]: *** [test-inline-pixbufs.h] Error 1
make[2]: Leaving directory '/usr/pkgsrc/x11/gtk2/work/gtk+-2.24.32/demos'
Makefile:733: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/usr/pkgsrc/x11/gtk2/work/gtk+-2.24.32'
Makefile:625: recipe for target 'all' failed
make: *** [all] Error 2
*** Error code 2

>How-To-Repeat:
cd /usr/pkgsrc/x11/gtk2 && bmake install
>Fix: