Reverting commit 8d6d088622 as per Gilles request.

The work on revamping the random packages is perfoemd in the random-ravamp branch.

src/main/java/org/apache/commons/math4/random/BaseRandomGenerator.java

@@ -120,7 +120,7 @@ public abstract class BaseRandomGenerator
             int bits;
             int val;
             do {
-                bits = nextInt() >>> 1;
+                bits = (nextInt() >>> 1);
                 val = bits % n;
             } while (bits - val + (n - 1) < 0);
             return val;