npc indicators: Use isDying for dead NPC checks (runelite#15160)

runelite-client/src/main/java/net/runelite/client/plugins/npchighlight/NpcIndicatorsPlugin.java

@@ -61,6 +61,7 @@
 import net.runelite.client.config.ConfigManager;
 import net.runelite.client.eventbus.Subscribe;
 import net.runelite.client.events.ConfigChanged;
+import net.runelite.client.game.NpcUtil;
 import net.runelite.client.game.npcoverlay.HighlightedNpc;
 import net.runelite.client.game.npcoverlay.NpcOverlayService;
 import net.runelite.client.plugins.Plugin;
@@ -276,12 +277,12 @@ public void onMenuEntryAdded(MenuEntryAdded event)
 		else
 		{
 			Color color = null;
-			if (npc.isDead())
+			if (NpcUtil.isDying(npc))
 			{
 				color = config.deadNpcMenuColor();
 			}
 
-			if (color == null && highlightedNpcs.containsKey(npc) && config.highlightMenuNames() && (!npc.isDead() || !config.ignoreDeadNpcs()))
+			if (color == null && highlightedNpcs.containsKey(npc) && config.highlightMenuNames() && (!NpcUtil.isDying(npc) || !config.ignoreDeadNpcs()))
 			{
 				color = config.highlightColor();
 			}
@@ -668,7 +669,7 @@ private HighlightedNpc highlightedNpc(NPC npc)
 			.nameOnMinimap(config.drawMinimapNames())
 			.borderWidth((float) config.borderWidth())
 			.outlineFeather(config.outlineFeather())
-			.render(n -> !n.isDead() || !config.ignoreDeadNpcs())
+			.render(n -> !NpcUtil.isDying(n) || !config.ignoreDeadNpcs())
 			.build();
 	}
 }