Closing the player while AMR is fetching a new file will yield a crash!

[Tygre]

Closing the player while AMR is fetching a new file will yield a crash because the ARexx MsgPort to the player will not be available anymore... it may be (ULONG)0 actullay but that should be double-checked!

[Tygre]

Following the code snippet here, I changed the implementation of the function to execute ARexx commands so that it looks for ports and put the message within a Forbid()/Permit() "block" so this problem does not occur anymore!