Allow printflushing to null (#7243)

* Allow `printflush`ing to null

* Dumb

core/src/mindustry/logic/LExecutor.java

@@ -1026,8 +1026,9 @@ public class LExecutor{
                 d.message.setLength(0);
                 d.message.append(exec.textBuffer, 0, Math.min(exec.textBuffer.length(), maxTextBuffer));
 
-                exec.textBuffer.setLength(0);
             }
+            exec.textBuffer.setLength(0);
+
         }
     }