Types: Simplify UA_NodeId_isNull to only cover numeric NodeIds
Types: Simplify UA_NodeId_isNull to only cover numeric NodeIds

jpfr/open62541,JGrothoff/open62541,open62541/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,StalderT/open62541,jpfr/open62541,open62541/open62541,StalderT/open62541,JGrothoff/open62541,JGrothoff/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,open62541/open62541