safe_mul_uint32
operand1 = safe_mul_uint32(kvalues[0] * EIGRP_SCALING_FACTOR,
operand2 = safe_mul_uint32(kvalues[1] * EIGRP_SCALING_FACTOR,
operand3 = safe_mul_uint32(kvalues[2] * EIGRP_SCALING_FACTOR, delay);
static uint32_t safe_mul_uint32(uint32_t, uint32_t);