remove compiler warning
remove compiler warning

nekulin/arangodb,nekulin/arangodb,nekulin/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nekulin/arangodb,nvoron23/arangodb,nekulin/arangodb,nekulin/arangodb,nekulin/arangodb,nekulin/arangodb,nvoron23/arangodb,nekulin/arangodb,nvoron23/arangodb,nekulin/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb