Get rid of some mem* calls that are bad C++ form (but worked fine) and cause warnings.

node/CertificateOfMembership.hpp

@@ -112,14 +112,9 @@ public:
 	/**
 	 * Create an empty certificate of membership
 	 */
-	CertificateOfMembership()
+	CertificateOfMembership() :
+		_qualifierCount(0)
 	{
-		memset(this,0,sizeof(CertificateOfMembership));
-	}
-
-	CertificateOfMembership(const CertificateOfMembership &c)
-	{
-		memcpy(this,&c,sizeof(CertificateOfMembership));
 	}
 
 	/**
@@ -145,12 +140,6 @@ public:
 		memset(_signature.data,0,ZT_C25519_SIGNATURE_LEN);
 	}
 
-	inline CertificateOfMembership &operator=(const CertificateOfMembership &c)
-	{
-		memcpy(this,&c,sizeof(CertificateOfMembership));
-		return *this;
-	}
-
 	/**
 	 * Create from binary-serialized COM in buffer
 	 *

node/Revocation.hpp

@@ -58,9 +58,16 @@ class Revocation : public Credential
 public:
 	static inline Credential::Type credentialType() { return Credential::CREDENTIAL_TYPE_REVOCATION; }
 
-	Revocation()
+	Revocation() :
+		_id(0),
+		_credentialId(0),
+		_networkId(0),
+		_threshold(0),
+		_flags(0),
+		_target(),
+		_signedBy(),
+		_type(Credential::CREDENTIAL_TYPE_NULL)
 	{
-		memset(this,0,sizeof(Revocation));
 	}
 
 	/**