Update comment

contracts/TransmuteDPOS.sol

@@ -110,8 +110,8 @@ contract TransmuteDPOS is TransmuteToken, RoundManager, ProviderPool {
   function bond(address _provider, uint _amount) external {
     require(_amount > 0);
     Provider storage p = providers[_provider];
-    // A delegator is only allowed to bond to an Unregistered provider if the provider is himself
-    // otherwise _provider has to be associated with a Registered provider
+    // A delegator is only allowed to bond to himself (in which case he wants to be a Provider)
+    // or to a Registered provider
     require(_provider == msg.sender || p.status == ProviderStatus.Registered);
     // Check if delegator has not already bonded to some address
     require(delegators[msg.sender].delegateAddress == address(0));