Merge #1476: ignore all txs with nonstandard sPKs when scanning

abbffef ignore matched txs with invalid sPKs when scanning (openoms)

Pull request description:

  Fixes the second edge case in #1471

  completes #1473

ACKs for top commit:
  AdamISZ:
    tACK abbffef
  kristapsk:
    utACK abbffef

Tree-SHA512: 2789a1e604820726fc3261b9611e42ac19968f1ba8272512a715ace885672bca7692cc5ccfd59aa1469961660f2f410f437b406ce2dec319f52505750d9b7d7b

jmbitcoin/jmbitcoin/snicker.py

@@ -161,8 +161,11 @@ def is_snicker_v1_tx(tx):
                 except CCoinAddressError:
                     return False
             else:
-                if not btc.CCoinAddress.from_scriptPubKey(
-                    vo.scriptPubKey).get_scriptPubKey_type() == matched_spk:
+                try:
+                    if not btc.CCoinAddress.from_scriptPubKey(
+                        vo.scriptPubKey).get_scriptPubKey_type() == matched_spk:
+                        return False
+                except CCoinAddressError:
                     return False
     assert matched_spk
     return True