Fix memory leak
Fix memory leak

Credit to OSS-Fuzz

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