FSN#34679 ook als er nog geen terreinen waren

svn path=/Database/trunk/; revision=28165

_UP/DB27to28.src

@@ -26,7 +26,7 @@ DECLARE
    stmt   VARCHAR2 (200);
 BEGIN
    SELECT 'CREATE SEQUENCE alg_s_alg_srtterrein_key START WITH '
-          || MAX (alg_srtterreinsector_key + 1)
+          || COALESCE(MAX (alg_srtterreinsector_key + 1), 1)
      INTO stmt
      FROM alg_srtterreinsector;