Scripts/Misc: Fix LoadMinionData() dynamic analysis issues

Fix issues reported by Address Sanitizer about LoadMinionData() calls on arrays that don't end with a {0, 0} pair.

(cherry picked from commit 08dcee0cf9)

src/server/scripts/Northrend/UtgardeKeep/UtgardeKeep/instance_utgarde_keep.cpp

@@ -33,7 +33,7 @@ MinionData const minionData[] =
 {
     { NPC_SKARVALD,     DATA_SKARVALD_DALRONN },
     { NPC_DALRONN,      DATA_SKARVALD_DALRONN },
-    { 0,                0                     } // END
+    { 0,                0 }
 };
 
 class instance_utgarde_keep : public InstanceMapScript

src/server/scripts/Outland/GruulsLair/instance_gruuls_lair.cpp

@@ -34,7 +34,7 @@ MinionData const minionData[] =
     { NPC_OLM_THE_SUMMONER,     DATA_MAULGAR },
     { NPC_KIGGLER_THE_CRAZED,   DATA_MAULGAR },
     { NPC_BLINDEYE_THE_SEER,    DATA_MAULGAR },
-    { 0,                        0            } // END
+    { 0, 0 }
 };
 
 class instance_gruuls_lair : public InstanceMapScript