bugfix in LDLt for size==1
bugfix in LDLt for size==1

--HG--
extra : convert_revision : svn%3A283d02a7-25f6-0310-bc7c-ecb5cbfe19da/trunk/kdesupport/eigen2%40921335

mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,rotorliu/eigen,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,rotorliu/eigen,madlib/eigen_backup