[Change/Add] Analyze: daily selrulecounts, added count Size == 0

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>
[Fix] Analyze: vnames empty bug

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>
[Change] selecttarades: check for size <= 0

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>