From c64ca6870ea3f76b5ea5182bba1e62fd5a632f89 Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Sat, 31 Oct 2009 11:49:20 -0400
Subject: [PATCH] this explicit keyword can't hurt

---
 Eigen/src/Core/MatrixBase.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 73befb35e..f88d5939f 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -159,7 +159,7 @@ template<typename Derived> class MatrixBase
     inline int size() const { return rows() * cols(); }
     /** \returns the number of nonzero coefficients which is in practice the number
       * of stored coefficients. */
-    inline int nonZeros() const { return size(); }
+    inline int nonZeros() const { return derived.nonZeros(); }
     /** \returns true if either the number of rows or the number of columns is equal to 1.
       * In other words, this function returns
       * \code rows()==1 || cols()==1 \endcode
@@ -636,7 +636,7 @@ template<typename Derived> class MatrixBase
     }
 
   private:
-    MatrixBase(int);
+    explicit MatrixBase(int);
     MatrixBase(int,int);
     template<typename OtherDerived> explicit MatrixBase(const MatrixBase<OtherDerived>&);
 };