fix exception on global destroy for Expression
fix exception on global destroy for Expression

smelukov/basisjs,tyanas/basisjs,fateevv/basisjs,smelukov/basisjs,istrel/basisjs,istrel/basisjs,fateevv/basisjs,basisjs/basisjs,fateevv/basisjs,basisjs/basisjs,istrel/basisjs,smelukov/basisjs,tyanas/basisjs,basisjs/basisjs,tyanas/basisjs