fix: Decoder may raise KeyError
This fixes an issue where a KeyError may be raised when 'A5'
is not present in `fcp`
Change-Id: I5bb6131bd76c7bae2a70034c429cae2b380d164f
diff --git a/pySim/ts_102_221.py b/pySim/ts_102_221.py
index adb40c1..f145d19 100644
--- a/pySim/ts_102_221.py
+++ b/pySim/ts_102_221.py
@@ -684,7 +684,7 @@
fcp_tlv = TLV(FCP_TLV_MAP)
fcp = fcp_tlv.parse(fcp_base['62'])
# further decode the proprietary information
- if fcp['A5']:
+ if 'A5' in fcp:
prop_tlv = TLV(FCP_Proprietary_TLV_MAP)
prop = prop_tlv.parse(fcp['A5'])
fcp['A5'] = tlv_val_interpret(FCP_prorietary_interpreter_map, prop)