Computes the sum of two EC_POINT
\param group underlying EC_GROUP object
\param r EC_POINT object for the result (r = a + b)
\param a EC_POINT object with the first summand
\param b EC_POINT object with the second summand
\param ctx BN_CTX object (optional)
\return 1 on success and 0 if an error occured
Computes the sum of two EC_POINT \param group underlying EC_GROUP object \param r EC_POINT object for the result (r = a + b) \param a EC_POINT object with the first summand \param b EC_POINT object with the second summand \param ctx BN_CTX object (optional) \return 1 on success and 0 if an error occured