fixed race conditin

Identity.cpp

@@ -365,6 +365,7 @@ namespace data
 	
 	void IdentityEx::DropVerifier () const
 	{
+		// TODO: potential race condition with Verify
 		m_Verifier = nullptr; 
 	}
 

RouterInfo.cpp

@@ -65,7 +65,6 @@ namespace data
 			LogPrint (eLogError, "RouterInfo: signature verification failed");
 			m_IsUnreachable = true;
 		}
-		m_RouterIdentity->DropVerifier ();
 	}	
 		
 	void RouterInfo::SetRouterIdentity (std::shared_ptr<const IdentityEx> identity)