Check the gsm0503_xcch_decode return value
- Discard the message when gsm0503_xcch_decode returns -1
- Add automated decrypt test
See https://groups.google.com/d/msg/gr-gsm/9nOkIdrGOck/qTZh47McCQAJ
diff --git a/tests/fixtures/grgsm_decode_decrypt1_expected b/tests/fixtures/grgsm_decode_decrypt1_expected
new file mode 100644
index 0000000..378b495
--- /dev/null
+++ b/tests/fixtures/grgsm_decode_decrypt1_expected
@@ -0,0 +1,12 @@
+862210 1331352: 03 03 01 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b
+862242 1332356: 00 01 03 03 49 06 1d 9f 6d 18 10 80 00 00 00 00 00 00 00 00 00 00 00
+862261 1331351: 01 73 35 06 27 00 03 50 18 a0 05 f4 01 5c 57 03 2b 2b 2b 2b 2b 2b 2b
+862312 1331350: 03 20 0d 06 35 11 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b
+862344 1332354: 00 00 03 03 2d 06 1e 2b d9 62 f2 20 01 3e 95 78 7b 2b 2b 2b 2b 2b 2b
+862363 1331349: 03 42 45 13 05 1e 02 ea 81 5c 08 11 83 94 03 98 93 92 49 81 2b 2b 2b
+862414 1331348: 01 61 01 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b
+862446 1332352: 00 00 03 03 49 06 1d 9f 6d 18 10 80 00 00 00 00 00 00 00 00 00 00 00
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+862548 1332376: 00 00 03 03 49 06 06 70 00 00 00 00 00 04 15 50 10 00 00 00 00 0a a8
+862567 1331345: 03 03 01 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b