Ignore coverity scan issue 79031

Don't call -- The called function is unsafe for security related code.
Could result in a security violation.

However, this is not security related code so the issue is a false
positive.

src/svxlink/modules/echolink/ModuleEchoLink.cpp

@@ -1843,6 +1843,7 @@ void ModuleEchoLink::handleCommand(const string& cmd)
     if (count > 0)
     {
       srand(time(NULL));
+        // coverity[dont_call]
       size_t random_idx = (size_t)(count * ((double)rand() / (1.0 + RAND_MAX)));
       StationData station = nodes[random_idx];