Merge branch 'fix/hang_on_error' into 'master'

stop CLI UIs after client thread has been stopped

See merge request sheepitrenderfarm/client!104

src/com/sheepit/client/standalone/GuiText.java

@@ -88,6 +88,8 @@ public class GuiText implements Gui {
 			client.run();
 			client.stop();
 		}
+		// stop if there is no client or client has been stopped
+		this.stop();
 	}
 	
 	@Override public void stop() {

src/com/sheepit/client/standalone/GuiTextOneLine.java

@@ -100,6 +100,8 @@ public class GuiTextOneLine implements Gui {
 			client.run();
 			client.stop();
 		}
+		// stop if there is no client or client has been stopped
+		this.stop();
 	}
 	
 	@Override public void stop() {