Core/Scripts: Willix the Importer - $n in aggro text

* In the existing core script, Willix the Importer in Razorfen Kraul says
"Help! Get this $n off of me!" (showing the $n part in his SAY text)
instead of naming the attacker when using his 'SAY_AGGRO1' creature_text.

* With this commit change, unit target is no longer missing for Talk,
making Willix name the attacking unit when he shouts for help.

src/server/scripts/Kalimdor/RazorfenKraul/razorfen_kraul.cpp

@@ -113,9 +113,9 @@ public:
 
         void Reset() override { }
 
-        void EnterCombat(Unit* /*who*/) override
+        void EnterCombat(Unit* who) override
         {
-            Talk(SAY_AGGRO1);
+            Talk(SAY_AGGRO1, who);
         }
 
         void JustSummoned(Creature* summoned) override