Fix hidden virtual issue.

libethereum/CanonBlockChain.cpp

@@ -49,10 +49,10 @@ CanonBlockChain<Ethash>::CanonBlockChain(std::string const& _path, WithExisting
 {
 }
 
-void CanonBlockChain<Ethash>::reopen(std::string const& _path, WithExisting _we, ProgressCallback const& _pc)
+void CanonBlockChain<Ethash>::reopen(WithExisting _we, ProgressCallback const& _pc)
 {
 	close();
-	open(createGenesisBlock(), createGenesisState(), _path, _we, _pc);
+	open(createGenesisBlock(), createGenesisState(), m_dbPath, _we, _pc);
 }
 
 bytes CanonBlockChain<Ethash>::createGenesisBlock()

libethereum/CanonBlockChain.h

@@ -79,7 +79,7 @@ public:
 	~CanonBlockChain() {}
 
 	/// Reopen everything.
-	virtual void reopen(std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
+	virtual void reopen(WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
 
 	/// @returns the genesis block header.
 	static Ethash::BlockHeader const& genesis();