Fix lost count in perf_reader
Fix lost count in perf_reader

mcaleavya/bcc,mcaleavya/bcc,brendangregg/bcc,iovisor/bcc,tuxology/bcc,tuxology/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,iovisor/bcc,mcaleavya/bcc,tuxology/bcc,mcaleavya/bcc,brendangregg/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc,brendangregg/bcc,mcaleavya/bcc,iovisor/bcc