prevent troll

[jhj0517]

To resolve #83

Added UnitIsDeadOrGhost("player") to check if the player is really dead or not.

In my test :

• I spammed the fake messages below with this PR and without this PR.

  1$MyUser~~1988~4~3~1~~1438~0.5568,0.4460~
  3$MyUser-55267~~

• The log is not stacked with this PR when I spam the fake messages, in both cases that I'm dead or alive.

It works as intended on my test, but I am not 100% sure that this would prevent the fake alerts.

[jhj0517]

Wait. this is wrong, prevent the real alrets from others too. close it.