Bug#833300: libgtksourceview2.0-dev: Please depend on libpng-dev

[Ximin Luo]

Package: libgtksourceview2.0-dev
Version: 2.10.5-2
Severity: important

Dear Maintainer,

If libpng-dev is not installed, then `pkg-config --exists gtksourceview-2.0`
will fail.

$ pkg-config --exists gtksourceview-2.0 
[..]
Looking for package 'libpng16'
Looking for package 'libpng16-uninstalled'
1 # exit code

This also causes other tools which auto-detect gtksourceview-2.0 via pkg-config
to fail, e.g. `opam install ocaml-top`.

Installing the package libpng-dev fixes this problem locally, but this should
be automatic via this package's Depends.

X

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'stable'), (300, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libgtksourceview2.0-dev depends on:
ii  libgtk2.0-dev          2.24.30-4
ii  libgtksourceview2.0-0  2.10.5-2
ii  libxml2-dev            2.9.3+dfsg1-1.2

libgtksourceview2.0-dev recommends no packages.

Versions of packages libgtksourceview2.0-dev suggests:
pn  libgtksourceview2.0-doc  <none>

-- no debconf information