Explicitly handle NAN values

Author: sebromero

Diff for: src/property/types/CloudWrapperFloat.h

@@ -39,7 +39,10 @@ class CloudWrapperFloat : public CloudWrapperBase {
   public:
     CloudWrapperFloat(float& v) : _primitive_value(v), _cloud_value(v), _local_value(v) {}
     virtual bool isDifferentFromCloud() {
-      return _primitive_value != _cloud_value && (abs(_primitive_value - _cloud_value) >= Property::_min_delta_property);
+      if (std::isnan(_primitive_value) || std::isnan(_cloud_value)) {
+        return std::isnan(_primitive_value) != std::isnan(_cloud_value);
+      }
+      return _primitive_value != _cloud_value && fabs(_primitive_value - _cloud_value) >= Property::_min_delta_property;
     }
     virtual void fromCloudToLocal() {
       _primitive_value = _cloud_value;