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apdu/ts_102_221: extract channel number from dict before calling del_lchan

When the method del_lchan is called, closed_channel_nr still contains a dict
that contains the channel number under the key 'logical_channel_number'.
This will lead to an exception. We must extact the channel number from
the dict before we can use it with del_lchan. (See also
created_channel_nr)

Related: OS#6094
Change-Id: I399856bc227f17b66cdb4158a69a35d50ba222a7
---
M pySim/apdu/ts_102_221.py
1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/pySim/apdu/ts_102_221.py b/pySim/apdu/ts_102_221.py
index 3780c8a..2d3ad82 100644
--- a/pySim/apdu/ts_102_221.py
+++ b/pySim/apdu/ts_102_221.py
@@ -396,7 +396,7 @@
             self.col_id = '%02u' % created_channel_nr
             return {'mode': mode, 'created_channel': created_channel_nr }
         elif mode == 'close_channel':
-            closed_channel_nr = self.cmd_dict['p2']
+            closed_channel_nr = self.cmd_dict['p2']['logical_channel_number']
             rs.del_lchan(closed_channel_nr)
             self.col_id = '%02u' % closed_channel_nr
             return {'mode': mode, 'closed_channel': closed_channel_nr }

