DivideAndConquer does not have to create the 'second' thread, use 'this' tread, instead of letting 'this' tread wait.

Author: mjansson

src/main/java/org/ojalgo/concurrent/DivideAndConquer.java

@@ -86,11 +86,10 @@ static void call(final ExecutorService executor, final int first, final int limi
             int nextWorkers = workers / 2;
 
             Future<?> firstPart = executor.submit(() -> DivideAndConquer.call(executor, first, split, threshold, nextWorkers, conquerer));
-            Future<?> secondPart = executor.submit(() -> DivideAndConquer.call(executor, split, limit, threshold, nextWorkers, conquerer));
+            DivideAndConquer.call(executor, split, limit, threshold, nextWorkers, conquerer);
 
             try {
                 firstPart.get();
-                secondPart.get();
             } catch (final InterruptedException | ExecutionException cause) {
                 throw new RuntimeException(cause);
             }