Make event/board seeding actually do it RIGHT

Requesting N bits on certain types of events was enough to tickle timing
issues with events between client & server so I got those cleared up,
and in a roundabout way made piece prediction harder, BUT it wasn't
actually doing what I'd really intended. I'd originally done things this
way (call something on the RNG N times) and then in a brief moment of
brilliant stupidity went "gee, next() does different stuff based on the
number of bits you asked for, so clearly it'll mix things up"

Man, this hairshirt is itchy.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@899 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/puzzle/data/Board.java

@@ -96,7 +96,9 @@ public abstract class Board
     public void seedFromEvent (int pidx, int gevent)
     {
         if (isSeedingEvent(pidx, gevent)) {
-            _rando.next(getSeedForEvent(pidx, gevent));
+            for (int ii = 0, jj = getSeedForEvent(pidx, gevent); ii < jj; ii++) {
+                _rando.next(0);
+            }
         }
     }