[saco] Add ms_dwRSAKeySize variable to CKeyPair

saco/archive/KeyPair.cpp

@@ -4,6 +4,10 @@
 
 //------------------------------------
 
+DWORD CKeyPair::ms_dwRSAKeySize = 1024;
+
+//------------------------------------
+
 CKeyPair::CKeyPair(CCryptoContext* pContext)
 {
 	m_pContext = pContext;

saco/archive/KeyPair.h

@@ -7,6 +7,8 @@
 class CKeyPair
 {
 private:
+	static DWORD ms_dwRSAKeySize;
+
 	HCRYPTKEY m_hCryptKey;
 	CCryptoContext* m_pContext;