[longomatch] Add Language headers to po files

[Piotr Drąg <piotrdrag src gnome org>]

commit 09aeb810ae7c644da4c0e193810f466ab659426e
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Jul 24 20:52:31 2016 +0200

    Add Language headers to po files
    
    Future versions of gettext will fail if this header is missing.

 po/eu.po       |    2 +-
 po/oc.po       |    1 +
 po/ro.po       |    2 +-
 po/sr latin po |    2 +-
 4 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/po/eu.po b/po/eu.po
index 5250a75..328d78a 100644
--- a/po/eu.po
+++ b/po/eu.po
@@ -16,7 +16,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Language: eu_ES\n"
+"Language: eu\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: ../libcesarplayer/lgm-video-player.c:337
diff --git a/po/oc.po b/po/oc.po
index 9db71c6..95032db 100644
--- a/po/oc.po
+++ b/po/oc.po
@@ -11,6 +11,7 @@ msgstr ""
 "PO-Revision-Date: 2016-04-18 16:52+0000\n"
 "Last-Translator: Cédric VALMARY (Tot en òc) <cvalmary yahoo fr>\n"
 "Language-Team: Occitan (post 1500) <oc li org>\n"
+"Language: oc\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/po/ro.po b/po/ro.po
index 7f728ac..eb0aba8 100644
--- a/po/ro.po
+++ b/po/ro.po
@@ -16,7 +16,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Language: ro_RO\n"
+"Language: ro\n"
 "Plural-Forms: nplurals=3; plural=(n==1?0:(((n%100>19)||((n%100==0)&&(n!=0)))?2:1));\n"
 
 #: ../libcesarplayer/lgm-video-player.c:337
diff --git a/po/sr latin po b/po/sr latin po
index 74fb1bc..f2c9167 100644
--- a/po/sr latin po
+++ b/po/sr latin po
@@ -12,7 +12,7 @@ msgstr ""
 "PO-Revision-Date: 2016-01-03 10:38+0200\n"
 "Last-Translator: Miroslav Nikolić <miroslavnikolic rocketmail com>\n"
 "Language-Team: Serbian <gnom prevod org>\n"
-"Language: sr\n"
+"Language: sr@latin\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"