Fix - when streamer info with chechsum not found, remove checksum
Fix - when streamer info with chechsum not found, remove checksum

It happens for classes, which are stored into the ROOT file, but does
not have streamer info - like TEveTrack. In this case version is 0 and
wrongly checksum is read. 
bellenot/jsroot,bellenot/jsroot,root-project/jsroot,linev/jsroot,root-project/jsroot,bellenot/jsroot,linev/jsroot