CEGUI: added a missing check for dynamic target existence
CEGUI: added a missing check for dynamic target existence

niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina