fix bug #316 - SelfAdjointEigenSolver::compute does not handle matrices of size (1,1) correctly

Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h

diff --git a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
index eeab325..965dda8 100644
--- a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
+++ b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
@@ -387,7 +387,7 @@
   {
     m_eivalues.coeffRef(0,0) = internal::real(matrix.coeff(0,0));
     if(computeEigenvectors)
-      m_eivec.setOnes();
+      m_eivec.setOnes(n,n);
     m_info = Success;
     m_isInitialized = true;
     m_eigenvectorsOk = computeEigenvectors;