Get rid of include directives inside namespace blocks (bug #339).

Eigen/src/SparseCore/SparseCwiseBinaryOp.h

@@ -25,6 +25,8 @@
 #ifndef EIGEN_SPARSE_CWISE_BINARY_OP_H
 #define EIGEN_SPARSE_CWISE_BINARY_OP_H
 
+namespace Eigen { 
+
 // Here we have to handle 3 cases:
 //  1 - sparse op dense
 //  2 - dense op sparse
@@ -332,4 +334,6 @@ SparseMatrixBase<Derived>::cwiseProduct(const MatrixBase<OtherDerived> &other) c
   return EIGEN_SPARSE_CWISE_PRODUCT_RETURN_TYPE(derived(), other.derived());
 }
 
+} // end namespace Eigen
+
 #endif // EIGEN_SPARSE_CWISE_BINARY_OP_H