[svn-r4707]

Purpose:
    Bug fixing
Description:
    H5IdComponent::operator= shouldn't be virtual because the subclass'
    operator= have different type for the rhs argument.  Removed virtual
Platforms tested:
    SunOS 5.7 (arabica)
    IRIX64 (modi4) - only tested that the warnings went away, still working
                        on other configuration problems.

c++/src/H5IdComponent.h

@@ -42,7 +42,7 @@ class IdComponent {
 	bool noReference();
 
 	// Assignment operator
-	virtual IdComponent& operator=( const IdComponent& rhs );
+	IdComponent& operator=( const IdComponent& rhs );
 
 	// Resets this IdComponent instance
 	//template <class Type>