Fix: racing condition with messages when the queue is full (#223)

There was a racing condition between the queue full message and *any* error message where the later are overwritten by the former.

src/com/sheepit/client/Client.java

@@ -358,14 +358,17 @@ public class Client {
 						this.renderingJob = null;
 					}
 					
+					if (this.shouldWaitBeforeRender() == true) {
+						this.gui.status("Sending frames. Please wait");
+						
 						while (this.shouldWaitBeforeRender() == true) {
 							try {
 								Thread.sleep(4000); // wait a little bit
-							this.gui.status("Sending frames. Please wait");
 							}
 							catch (InterruptedException e3) {
 							}
 						}
+					}
 					this.log.removeCheckPoint(step);
 				}
 				

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

@@ -206,7 +206,7 @@ public class GuiSwing extends JFrame implements Gui {
 	
 	@Override
 	public void error(String msg_) {
-		status(msg_);
+		status(msg_, true);
 	}
 	
 	@Override