Fix BauGUICommand

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/gui/BauGUICommand.java

@@ -70,8 +70,12 @@ public class BauGUICommand extends SWCommand {
 
     @Register("import")
     public void importGui(Player p, String code) {
+        try {
             if (BauGuiImportExport.importGui(code, p)) {
                 BauSystem.MESSAGE.send("GUI_IMPORT_CODE-SUCCESSFUL", p);
             }
+        } catch (Exception e) {
+            BauSystem.MESSAGE.send("GUI_IMPORT_INVALID-CODE", p);
+        }
     }
 }