[gnome-control-center] Fix to Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 126d34ec3d5dceabd830cd3bc7e697d810b5b120
Author: Jordi Mas <jmas softcatala org>
Date:   Mon Oct 31 08:50:44 2016 +0100

    Fix to Catalan translation

 po/ca.po |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/po/ca.po b/po/ca.po
index c539837..1c72752 100644
--- a/po/ca.po
+++ b/po/ca.po
@@ -5518,10 +5518,11 @@ msgstr "Detecció de pics"
 msgid "Device"
 msgstr "Dispositiu"
 
+# N.T.: Títol de quadre de diàleg
 #: ../panels/sound/gvc-mixer-dialog.c:1575
 #, c-format
 msgid "Speaker Testing for %s"
-msgstr "S'estan provant els altaveus per a %s"
+msgstr "Prova d'altaveus per a %s"
 
 #: ../panels/sound/gvc-mixer-dialog.c:1631
 msgid "_Output volume:"