Map - Use SlotItemChanged event (#9961)

* Update XEH_postInitClient.sqf

* Use `addPlayerEH`

* Switch to `CBA_fnc_addBISPlayerEventHandler`

addons/map/XEH_postInitClient.sqf

@@ -65,15 +65,22 @@ GVAR(flashlights) = createHashMap;
 // hide clock on map if player has no watch
 GVAR(hasWatch) = true;
 
-["loadout", {
-    params ["_unit"];
-    if (isNull _unit) exitWith {
+[QGVAR(slotItemChanged), "SlotItemChanged", {
+    params ["", "_item", "_slot", "_assign"];
+
+    if (_slot != TYPE_WATCH) exitWith {};
+
+    GVAR(hasWatch) = _assign && {_item isKindOf ["ItemWatch", configFile >> "CfgWeapons"]};
+}] call CBA_fnc_addBISPlayerEventHandler;
+
+["unit", {
+    params ["_newPlayer"];
+
+    if (isNull _newPlayer) exitWith {
         GVAR(hasWatch) = true;
     };
-    GVAR(hasWatch) = false;
-    {
-        if (_x isKindOf ["ItemWatch", configFile >> "CfgWeapons"]) exitWith {GVAR(hasWatch) = true;};
-    } forEach (assignedItems _unit);
+
+    GVAR(hasWatch) = (_newPlayer getSlotItemName TYPE_WATCH) isKindOf ["ItemWatch", configFile >> "CfgWeapons"];
 }, true] call CBA_fnc_addPlayerEventHandler;