Cleared virtual destructor warning by explicitly adding them

ec2n.h

@@ -100,6 +100,8 @@ public:
 	Element BERDecodeElement(BufferedTransformation &bt) const {return m_ec.BERDecodePoint(bt);}
 	void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {m_ec.DEREncodePoint(bt, v, false);}
 
+	virtual ~EcPrecomputation() { }
+
 	// non-inherited
 	void SetCurve(const EC2N &ec) {m_ec = ec;}
 	const EC2N & GetCurve() const {return m_ec;}

ecp.h

@@ -109,6 +109,8 @@ public:
 	Element BERDecodeElement(BufferedTransformation &bt) const {return m_ec->BERDecodePoint(bt);}
 	void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {m_ec->DEREncodePoint(bt, v, false);}
 
+	virtual ~EcPrecomputation() { }
+
 	// non-inherited
 	void SetCurve(const ECP &ec)
 	{

eprecomp.h

@@ -44,6 +44,7 @@ public:
 	typedef T Element;
 
 	DL_FixedBasePrecomputationImpl() : m_windowSize(0) {}
+	virtual ~DL_FixedBasePrecomputationImpl() { }
 
 	// DL_FixedBasePrecomputation
 	bool IsInitialized() const

luc.cpp

@@ -97,6 +97,8 @@ class LUCPrimeSelector : public PrimeSelector
 {
 public:
 	LUCPrimeSelector(const Integer &e) : m_e(e) {}
+	virtual ~LUCPrimeSelector() { }
+
 	bool IsAcceptable(const Integer &candidate) const
 	{
 		return RelativelyPrime(m_e, candidate+1) && RelativelyPrime(m_e, candidate-1);

luc.h

@@ -119,6 +119,8 @@ public:
 	Element BERDecodeElement(BufferedTransformation &bt) const {return Integer(bt);}
 	void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {v.DEREncode(bt);}
 
+	virtual ~DL_GroupPrecomputation_LUC() { }
+
 	// non-inherited
 	void SetModulus(const Integer &v) {m_p = v;}
 	const Integer & GetModulus() const {return m_p;}
@@ -142,6 +144,8 @@ public:
 	Integer CascadeExponentiate(const DL_GroupPrecomputation<Element> &group, const Integer &exponent, const DL_FixedBasePrecomputation<Integer> &pc2, const Integer &exponent2) const
 		{throw NotImplemented("DL_BasePrecomputation_LUC: CascadeExponentiate not implemented");}	// shouldn't be called
 
+	virtual ~DL_BasePrecomputation_LUC() { }
+
 private:
 	Integer m_g;
 };
@@ -158,6 +162,8 @@ public:
 	Element CascadeExponentiate(const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const
 		{throw NotImplemented("LUC_GroupParameters: MultiplyElements can not be implemented");}
 
+	virtual ~DL_GroupParameters_LUC() { }
+
 	// NameValuePairs interface
 	bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
 	{

modexppc.h

@@ -21,6 +21,8 @@ public:
 	Element BERDecodeElement(BufferedTransformation &bt) const {return Integer(bt);}
 	void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {v.DEREncode(bt);}
 
+	virtual ~ModExpPrecomputation() { }
+
 	// non-inherited
 	void SetModulus(const Integer &v) {m_mr.reset(new MontgomeryRepresentation(v));}
 	const Integer & GetModulus() const {return m_mr->GetModulus();}

rsa.cpp

@@ -97,6 +97,8 @@ class RSAPrimeSelector : public PrimeSelector
 {
 public:
 	RSAPrimeSelector(const Integer &e) : m_e(e) {}
+	virtual ~RSAPrimeSelector() { }
+
 	bool IsAcceptable(const Integer &candidate) const {return RelativelyPrime(m_e, candidate-Integer::One());}
 	Integer m_e;
 };