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

Eigen/src/SVD/UpperBidiagonalization.h

@@ -25,6 +25,8 @@
 #ifndef EIGEN_BIDIAGONALIZATION_H
 #define EIGEN_BIDIAGONALIZATION_H
 
+namespace Eigen { 
+
 namespace internal {
 // UpperBidiagonalization will probably be replaced by a Bidiagonalization class, don't want to make it stable API.
 // At the same time, it's useful to keep for now as it's about the only thing that is testing the BandMatrix class.
@@ -156,4 +158,6 @@ MatrixBase<Derived>::bidiagonalization() const
 
 } // end namespace internal
 
+} // end namespace Eigen
+
 #endif // EIGEN_BIDIAGONALIZATION_H