Dean Henderson has been impressing upon his return to the starting line-up lately for Crystal Palace, now he’s sent a message to his teammate. For Oliver Glasner injuries have been a pretty substantial factor in his decision-making in the opening months of his reign. Crystal Palace already has a pretty long list upon his arrival, but since then things haven’t got much better. The most recent blow was to Sam Johnstone which then handed Dean Henderson his shot in the team for the first time under Glasner. In these displays, he hasn’t disappointed and has made a real case for himself to be the st…