Merge branch 'develop' of github.com:ethereum/cpp-ethereum into develop

README.md

@@ -24,7 +24,7 @@ Ethereum is based on a design in an original whitepaper by Vitalik Buterin. This
 - *LianaHus* (**Liana Husikyan**) Solidity
 - *chfast* (**Paweł Bylica**) EVMJIT
 - *cubedro* (**Marian Oancea**) web3.js
-- *gluk250* (**Vlad Gluhovsky**) Whisper
+- *gluk256* (**Vlad Gluhovsky**) Whisper
 - *programmerTim* (**Tim Hughes**) libethash-cl
 
 And let's not forget: Caktux (neth, ongoing CI), Eric Lombrozo (original MinGW32 cross-compilation), Marko Simovic (original CI).

libethereum/Client.cpp

@@ -694,8 +694,14 @@ void Client::onPostStateChanged()
 
 void Client::startMining()
 {
-	m_wouldMine = true;
-	rejigMining();
+	clog(ClientNote) << "MiningBenefactor: " << address();
+	if (address() != Address())
+	{
+		m_wouldMine = true;
+		rejigMining();
+	}
+	else
+		clog(ClientNote) << "You need to set a MiningBenefactor in order to mine!";
 }
 
 void Client::rejigMining()