Fix pipe framing not synced on server (#2847)

Author: MCTian-mi

src/main/java/gregtech/api/pipenet/tile/TileEntityPipeBase.java

@@ -81,7 +81,7 @@ public Material getFrameMaterial() {
 
     public void setFrameMaterial(@Nullable Material frameMaterial) {
         this.frameMaterial = frameMaterial;
-        if (world != null && world.isRemote) {
+        if (world != null && !world.isRemote) {
             writeCustomData(UPDATE_FRAME_MATERIAL, buf -> {
                 buf.writeVarInt(frameMaterial == null ? -1 : frameMaterial.getRegistry().getNetworkId());
                 buf.writeVarInt(frameMaterial == null ? -1 : frameMaterial.getId());