hotfix: always return a correct bytestring from bytestring_allocbuffer
hotfix: always return a correct bytestring from bytestring_allocbuffer

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