Core/Protocol:

- 5 new opcodes
- Some spell research and fixed MSG_CHANNEL_START
- Fixed SMSG_UPDATE_INSTANCE_ENCOUNTER_UNIT for 4.2.2, and removed SMSG_GAMEOBJECT_SPAWN_ANIM_OBSOLETE (which does not exist)

src/server/game/Instances/InstanceScript.cpp

@@ -397,22 +397,25 @@ void InstanceScript::SendEncounterUnit(uint32 type, Unit* unit /*= NULL*/, uint8
 
     switch (type)
     {
-        case ENCOUNTER_FRAME_ADD:
-        case ENCOUNTER_FRAME_REMOVE:
-        case 2:
+        case ENCOUNTER_FRAME_ENGAGE:
+        case ENCOUNTER_FRAME_DISENGAGE:
+        case ENCOUNTER_FRAME_UPDATE_PRIORITY:
+            if (!unit)
+                return;
             data.append(unit->GetPackGUID());
             data << uint8(param1);
             break;
-        case 3:
-        case 4:
-        case 6:
+        case ENCOUNTER_FRAME_ADD_TIMER:
+        case ENCOUNTER_FRAME_ENABLE_OBJECTIVE:
+        case ENCOUNTER_FRAME_DISABLE_OBJECTIVE:
+        case ENCOUNTER_FRAME_COMBAT_RES_LIMIT:
+            data << uint8(param1);
+            break;
+        case ENCOUNTER_FRAME_UPDATE_OBJECTIVE:
             data << uint8(param1);
             data << uint8(param2);
             break;
-        case 5:
-            data << uint8(param1);
-            break;
-        case 7:
+        case ENCOUNTER_FRAME_UNK7:
         default:
             break;
     }