Add vehicle dff leak fix back (#1640)

Co-authored-by: saml1er <[email protected]>

Author: saml1er

Client/game_sa/CRenderWareSA.cpp

@@ -388,11 +388,6 @@ void CRenderWareSA::ReplaceModel(RpClump* pNew, unsigned short usModelID, DWORD
 
             CBaseModelInfoSAInterface* pModelInfoInterface = pModelInfo->GetInterface();
             CBaseModelInfo_SetClump(pModelInfoInterface, pNewClone);
-
-            // CClumpModelInfo::SetClump will increment CTxdStore reference count.
-            // We must remove it again to avoid TXD leaks.
-            // UPDATE: This is disabled due to a crash reported in issue #1617
-            // CTxdStore_RemoveRef(pModelInfoInterface->usTextureDictionary);
             RpClumpDestroy(pOldClump);
         }
     }

Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp

@@ -513,8 +513,8 @@ int CLuaEngineDefs::EngineReplaceModel(lua_State* luaVM)
         ushort usModelID = CModelNames::ResolveModelID(strModelName);
         if (usModelID != INVALID_MODEL_ID)
         {
-            // This is disabled due to a crash reported in issue #1617
-            // m_pDFFManager->RestoreModel(usModelID);
+            // Fixes vehicle dff leak problem with engineReplaceModel
+            m_pDFFManager->RestoreModel(usModelID);
             if (pDFF->ReplaceModel(usModelID, bAlphaTransparency))
             {
                 lua_pushboolean(luaVM, true);