[devhelp] Add all source files to the POTFILES.in

[Sébastien Wilmet <swilmet src gnome org>]

commit 083ce83be2f66873ac37964fae293bcdd47c3cf4
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Feb 22 15:53:09 2018 +0100

    Add all source files to the POTFILES.in
    
    Normally this commit doesn't add new translatable strings, but it's
    better to have all source files listed, so that when a translatable
    string is added everything is fine.

 po/POTFILES.in |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 69459d9..21dc321 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -5,12 +5,16 @@ data/org.gnome.Devhelp.desktop.in.in
 data/org.gnome.devhelp.gschema.xml
 devhelp/dh-assistant-view.c
 devhelp/dh-book.c
+devhelp/dh-book-manager.c
 devhelp/dh-book-tree.c
 devhelp/dh-completion.c
+devhelp/dh-error.c
+devhelp/dh-init.c
 devhelp/dh-keyword-model.c
 devhelp/dh-link.c
 devhelp/dh-parser.c
 devhelp/dh-search-context.c
+devhelp/dh-settings.c
 devhelp/dh-sidebar.c
 devhelp/dh-util.c
 plugins/gedit-plugin/devhelp.plugin.desktop.in
@@ -19,6 +23,7 @@ src/dh-app.c
 src/dh-assistant.c
 src/dh-assistant.ui
 src/dh-main.c
+src/dh-preferences.c
 src/dh-preferences.ui
 src/dh-tab.c
 src/dh-tab-label.c