Use make functions for HELP_LINGUAS

Author: raveit65

help/Makefile.am

@@ -7,6 +7,11 @@ HELP_MEDIA = figures/file-sharing-preferences.png \
 	figures/sharing-over-bluetooth.png \
 	figures/receiving-over-bluetooth.png
 
-HELP_LINGUAS = ca cs de el en_GB es fr it pt_BR ro sl sv zh_CN
+# Add linguas to be ignored, e.g. IGNORE_HELP_LINGUAS = ca de es fr
+IGNORE_HELP_LINGUAS =
+HELP_LINGUAS = $(if $(IGNORE_HELP_LINGUAS), \
+	$(filter-out $(IGNORE_HELP_LINGUAS),$(subst /,,$(dir $(wildcard */*.po)))), \
+	$(subst /,,$(dir $(wildcard */*.po))) )
+ 
 
 -include $(top_srcdir)/git.mk