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

Eigen/src/Eigen2Support/Geometry/RotationBase.h

@@ -24,6 +24,8 @@
 
 // no include guard, we'll include this twice from All.h from Eigen2Support, and it's internal anyway
 
+namespace Eigen { 
+
 // this file aims to contains the various representations of rotation/orientation
 // in 2D and 3D space excepted Matrix and Quaternion.
 
@@ -132,3 +134,5 @@ static inline const MatrixBase<OtherDerived>& ei_toRotationMatrix(const MatrixBa
     YOU_MADE_A_PROGRAMMING_MISTAKE)
   return mat;
 }
+
+} // end namespace Eigen