Dont rebuild .pot file always, for fresh checkouts it will be readonly

include/buildrules

@@ -59,8 +59,8 @@ ifdef LINGUAS
 %.pot: $(XGETTEXTFILES)
 	xgettext --omit-header --language=C --keyword=_ -o $@ $(XGETTEXTFILES)
 
-%.po: $(PKG_NAME).pot
-	$(MSGMERGE) -o $@.tmpo $@ $<
+%.po:
+	$(MSGMERGE) -o $@.tmpo $@ $(PKG_NAME).pot
 	@if ! diff $@.tmpo $@ >/dev/null; then \
 		echo "$@ is out of date, see $@.tmpo"; \
 	fi