Fixed client blindly reading method return code even though the service might not return one.
Fixed client blindly reading method return code even though the service might not return one.

open62541/open62541,JGrothoff/open62541,open62541/open62541,AGIsmail/open62541,JGrothoff/open62541,open62541/open62541,JGrothoff/open62541,jpfr/open62541,StalderT/open62541,bostjanv/open62541,StalderT/open62541,jpfr/open62541,jpfr/open62541,open62541/open62541,StalderT/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,bostjanv/open62541,AGIsmail/open62541