NMMS#34659 -- Kortingen onterecht dubbel berekend

svn path=/Customer/trunk/; revision=27333

NMMS/nmms.sql

@@ -1374,7 +1374,7 @@ AS
                  AND fac.gettrackingdate ('MLDAFM', m.mld_melding_key) <
                         TRUNC (SYSDATE, 'MONTH')
                  AND m.mld_melding_key NOT IN
-                           (SELECT melding_key FROM nmms_monitoring)) m,
+                           (SELECT melding_key FROM nmms_monitoring WHERE melding_key IS NOT NULL)) m,
              nmms_v_monitoring mo
        WHERE m_start <> m.mld_melding_key AND m_start = mo.melding_key
          AND (    (status = 'Afgemeld' AND afw IS NULL) -- startmelding mag niet hangen op goedkeuring