Check_MK Werk 0341: Avoid rare exception in WATO when deleting a host

ID: 0341 Title: Avoid rare exception in WATO when deleting a host Component: WATO Level: 1 Class: Bug Fix Version: 1.2.5i1 When deleting a host in an environment with distributed WATO under circumstances that are unclear an exception could happen in a function called <tt>find_host_sites</tt>. This exception is now handled correctly.