fix: Accesscontrol clear check for valid memory
fix: Accesscontrol clear check for valid memory

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