Fix error on import

[atti92]

reported:

• https://discord.com/channels/1122747237546610760/1244412417136394341/1255693683265638421
• https://discord.com/channels/1122747237546610760/1122747237546610763/1257413063141752982

  Stack: Interface/AddOns/Cell/Utils.lua:1912: attempt to index local 'info' (a nil value)
  [string "@Interface/AddOns/Cell/Utils.lua"]:1912: in function `GetSpellNameAndIcon'
  [string "@Interface/AddOns/Cell/Utils.lua"]:705: in function `FilterInvalidSpells'
  [string "@Interface/AddOns/Cell/Modules/Layouts_ImportExport.lua"]:27: in function <...terface/AddOns/Cell/Modules/Layouts_ImportExport.lua:14>
  [string "@Interface/AddOns/Cell/Modules/Layouts_ImportExport.lua"]:99: in function <...terface/AddOns/Cell/Modules/Layouts_ImportExport.lua:84>

[enderneko]

Thanks!