prop: add extra assert to prop_read_value()
idnode: coverity fix variable initialization in idnode_filter_init()
service: fix service_class_caid_get() snprintf - coverity
tvhlog: tvhlog_thread - remove dead code (coverity)
config: coverify - fix possible NULL dereference
idnode: fix get functions (islist) - coverity
tcp: coverity don't close(-1)
cron: coverity chack for NULL string in cron_parse_val()
settings: add missing va_end() - coverity