[ticket/13083] Fix language string NO_ENTRIES for logs

The string was misleading because there does not
always have to be a period when viewing log entries.

PHPBB3-13083
Merge pull request #3112 from Elsensee/ticket/13083

[ticket/13083] Fix language string NO_ENTRIES for logs

* Elsensee/ticket/13083:
  [ticket/13083] Fix language string NO_ENTRIES for logs