MAHOUT-1390 - Fixes for SVD hang.

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1554748 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1390: SVN hangs for certain inputs

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1554749 13f79535-47bb-0310-9956-ffa450edef68