Description: remove nan locale code, it is unknown.
Author: Fathi Boudra <fabo@debian.org>

--- a/po/stellarium/CMakeLists.txt
+++ b/po/stellarium/CMakeLists.txt
@@ -2,7 +2,7 @@ SET(stellarium_DOMAIN stellarium)
 SET(stellarium_POT ${stellarium_DOMAIN}.pot)
 
 GETTEXT_CREATE_TRANSLATIONS(${stellarium_DOMAIN} DEFAULT_TARGET
-    af ar az be bg bn bs ca cs cy da de el en_AU en_CA en_GB en eo es et eu fa fil fi fr fy ga gl haw he hr hu hy ia id is it ja ka kn ko lt lv mk ml ms mt nan nb nl nn pl pt_BR pt ro ru se sk sl sq sr sv te th tl tr uk vi zh_CN zh_HK zh_TW
+    af ar az be bg bn bs ca cs cy da de el en_AU en_CA en_GB en eo es et eu fa fil fi fr fy ga gl haw he hr hu hy ia id is it ja ka kn ko lt lv mk ml ms mt nb nl nn pl pt_BR pt ro ru se sk sl sq sr sv te th tl tr uk vi zh_CN zh_HK zh_TW
 )
 
 ADD_CUSTOM_TARGET(