Fix more casts (#778)

Author: christophfroehlich

example_10/hardware/rrbot.cpp

@@ -197,11 +197,11 @@ hardware_interface::return_type RRBotSystemWithGPIOHardware::read(
   unsigned int seed = static_cast<unsigned int>(time(NULL)) + 1;
   set_state(
     info_.gpios[0].name + "/" + info_.gpios[0].state_interfaces[1].name,
-    static_cast<float>(rand_r(&seed)));
+    static_cast<double>(rand_r(&seed)));
   seed = static_cast<unsigned int>(time(NULL)) + 2;
   set_state(
     info_.gpios[0].name + "/" + info_.gpios[0].state_interfaces[2].name,
-    static_cast<float>(rand_r(&seed)));
+    static_cast<double>(rand_r(&seed)));
 
   for (const auto & [name, descr] : gpio_state_interfaces_)
   {

example_4/hardware/rrbot_system_with_sensor.cpp

@@ -184,7 +184,8 @@ hardware_interface::return_type RRBotSystemWithSensorHardware::read(
     // Simulate RRBot's sensor data
     unsigned int seed = static_cast<unsigned int>(time(NULL)) + i++;
     set_state(
-      name, static_cast<float>(rand_r(&seed)) / (static_cast<float>(RAND_MAX / hw_sensor_change_)));
+      name,
+      static_cast<double>(rand_r(&seed)) / (static_cast<double>(RAND_MAX / hw_sensor_change_)));
 
     ss << std::endl << "\t" << get_state(name) << " for sensor '" << name << "'";
   }