* update database up-to-date and/or empty checks

src/mu-util-xapian.h

@@ -38,6 +38,16 @@ G_BEGIN_DECLS
 gchar* mu_util_xapian_db_version (const gchar *xpath) G_GNUC_WARN_UNUSED_RESULT;
 
 
+/** 
+ * check whether the database is empty (contains 0 documents); in
+ * addition, a non-existing database is considered 'empty' too
+ * 
+ * @param xpath path to the xapian database
+ * 
+ * @return TRUE if the database is empty, FALSE otherwise
+ */
+gboolean mu_util_xapian_db_is_empty (const gchar *xpath);
+
 /** 
  * check if the 'schema' of the current database is up-to-date
  *