Fixed "Use of uninitialized value in concatenation (.) or string at ../..//Kernel/Modules/AgentTicketZoom.pm line 333.".
Fixed "Use of uninitialized value in concatenation (.) or string at ../..//Kernel/Modules/AgentTicketZoom.pm line 333.".

djoudi/otrs-gitimport-test,djoudi/otrs-gitimport-test,djoudi/otrs-gitimport-test