fix ntp kosong, dan ntb kosong

esipkd/views/rpc.py

@@ -184,13 +184,13 @@ def get_payment(request, data):
     for k in row_payment:
         d = dict(
             kd_bayar = data['kd_bayar'],
-            ntp = k.ntp.strip(),
+            ntp = k.ntp and k.ntp.strip() or '',
             pembayaran_ke = k.pembayaran_ke,
             bunga = k.bunga,
             bayar = k.bayar,
             tgl_bayar = ymd(k.tgl_bayar),
             jatuh_tempo = ymd(k.jatuh_tempo),
-            ntb = k.ntb.strip(),
+            ntb = k.ntb and k.ntb.strip() or '',
             bank_id = k.bank_id,
             channel_id = k.channel_id,
         )