Begin the code to allow a node to enter the consensus process even if it's not proposing and

even if it's not validating. This also fixes the bug Arthur reported.

src/LedgerProposal.cpp

@@ -28,6 +28,12 @@ LedgerProposal::LedgerProposal(const NewcoinAddress& naSeed, const uint256& prev
 	mPeerID		= mPublicKey.getNodeID();
 }
 
+LedgerProposal::LedgerProposal(const uint256& prevLgr, const uint256& position) :
+	mPreviousLedger(prevLgr), mCurrentHash(position), mProposeSeq(0)
+{
+	;
+}
+
 uint256 LedgerProposal::getSigningHash() const
 {
 	Serializer s(72);