Potential NPE in generated Category Beans

[PhilMFischer]

As it becomes visible in https://github.com/virtualsatellite/VirtualSatellite4-CEF/issues/99 there is a case where IntPropertiesBeans in CatgeoryBeans may hand back a null as value. Since the Properties hand back the AutoBoxingType which can be null, the Category hands back the primitive type. The cast results in a NullPointerException.

The CodeGenerator for the CatgeoryBean should be adjusted to hand back the AutoBoxingTypes rather than the primitives, e.g.:

				public Long «propertyMethodGet(property)»() {
					«propertyMethodSafeAccess(property)»;
					return «property.name».getValue();
				}
				
				public boolean «propertyMethodIsSet(property)»() {
					«propertyMethodSafeAccess(property)»;
					return «property.name».isSet();
				}

instead of:

				public long «propertyMethodGet(property)»() {
					«propertyMethodSafeAccess(property)»;
					return «property.name».getValue();
				}
				
				public boolean «propertyMethodIsSet(property)»() {
					«propertyMethodSafeAccess(property)»;
					return «property.name».isSet();
				}

But don't change the boolean from the isSet to an AutoBoxingType.

[andriikovalov-dlr]

Shall we also change float properties to return Double null if it's not set insteat of NaN?

[SaMuellerDLR]

@PhilMFischer Please check ticket.