current_sector.php: fix combat log ID type
current_sector.php: fix combat log ID type

When parsing the combat log ID from the sector message in the function
`checkForAttackMessage`, convert the parsed ID (stored as a string) to
an int so that it can be passed to functions that expect an int.

hemberger/smr,smrealms/smr,hemberger/smr,smrealms/smr,hemberger/smr,smrealms/smr,hemberger/smr