Fix forgotten random in critical section

ta1/Mutex.java

@@ -11,7 +11,7 @@ public abstract class Mutex {
 			int rdIter = ThreadLocalRandom.current().nextInt(minIter, maxIter + 1);
 			
 			System.out.println("^");
-			for (int k = 0; k < maxIter; k++) {
+			for (int k = 0; k < rdIter; k++) {
 				System.out.println(mark);
 				Thread.sleep(msWait);
 			}