Update meshRenderSystem.cpp

Engine/source/T3D/systems/render/meshRenderSystem.cpp

@@ -132,7 +132,7 @@ void MeshRenderSystem::render(SceneManager *sceneManager, SceneRenderState* stat
 
          // We sort by the material then vertex buffer
          ri->defaultKey = matInst->getStateHint();
-         ri->defaultKey2 = (U32)ri->vertBuff; // Not 64bit safe!
+         ri->defaultKey2 = (uintptr_t)ri->vertBuff;
 
                                                     // Submit our RenderInst to the RenderPassManager
          state->getRenderPass()->addInst(ri);
@@ -375,4 +375,4 @@ U32 MeshRenderSystem::findBufferSetByMaterial(U32 matId)
    }
 
    return -1;
-}
+}