fix(piston): Fixed the issue of PoseStack not being emptied due to premature returns

Author: QiuShui1012

module.moveable-entity-block/src/main/java/dev/anvilcraft/lib/v2/piston/mixin/PistonHeadRendererMixin.java

@@ -40,8 +40,9 @@ private void render(
         BlockEntityRenderer<BlockEntity> renderer = Minecraft.getInstance()
             .getBlockEntityRenderDispatcher()
             .getRenderer(be);
-        if (renderer == null) return;
-        renderer.render(be, partialTick, poseStack, bufferSource, packedLight, packedOverlay, cameraPos);
+        if (renderer != null) {
+            renderer.render(be, partialTick, poseStack, bufferSource, packedLight, packedOverlay, cameraPos);
+        }
         poseStack.popPose();
     }
 }