Fix crash in CModelInfoSA::GetVehicleWheelSize if model info is not loaded

Also applied to SetVehicleWheelSize

Author: sbx320

Client/game_sa/CModelInfoSA.cpp

@@ -1020,6 +1020,10 @@ float CModelInfoSA::GetVehicleWheelSize(eResizableVehicleWheelGroup eWheelGroup)
     if (!IsVehicle())
         return 0.0f;
 
+    // Request model load right now if not loaded yet
+    if (!IsLoaded())
+        Request(BLOCKING, "GetVehicleWheelSize");
+
     auto pVehicleModel = reinterpret_cast<CVehicleModelInfoSAInterface*>(m_pInterface);
     switch (eWheelGroup)
     {
@@ -1037,6 +1041,10 @@ void CModelInfoSA::SetVehicleWheelSize(eResizableVehicleWheelGroup eWheelGroup,
     if (!IsVehicle())
         return;
 
+    // Request model load right now if not loaded yet
+    if (!IsLoaded())
+        Request(BLOCKING, "SetVehicleWheelSize");
+
     auto pVehicleModel = reinterpret_cast<CVehicleModelInfoSAInterface*>(m_pInterface);
 
     // Store default wheel sizes in map