........S. [ZBX-7659] fixed handling of hosts without any interfaces

git-svn-id: svn://svn.zabbix.com/trunk@43258 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
.D........ [ZBX-7659] added ChangeLog entry

git-svn-id: svn://svn.zabbix.com/trunk@43261 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
.......... [ZBX-5804] added overflow/wrapping detection to calculated items

git-svn-id: svn://svn.zabbix.com/trunk@43269 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2