fix(Scripts/BRD): Emperor should not yell when dead. (#12046)

Co-authored-by: Skjalf <47818697+Nyeriah@users.noreply.github.com>

src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockDepths/boss_emperor_dagran_thaurissan.cpp

@@ -80,7 +80,10 @@ public:
                 {
                     if (hasYelled < 5)
                     {
-                        Talk(SenatorYells[hasYelled]);
+                        if (me->IsAlive())
+                        {
+                            Talk(SenatorYells[hasYelled]);
+                        }
                     }
                     hasYelled++;
                 }