Fix all doxygen warnings.

unsupported/Eigen/src/EulerAngles/EulerAngles.h

@@ -299,6 +299,7 @@ namespace Eigen
 
 #define EIGEN_EULER_ANGLES_SINGLE_TYPEDEF(AXES, SCALAR_TYPE, SCALAR_POSTFIX) \
   /** \ingroup EulerAngles_Module */ \
+  /** \brief \noop                */ \
   typedef EulerAngles<SCALAR_TYPE, EulerSystem##AXES> EulerAngles##AXES##SCALAR_POSTFIX;
 
 #define EIGEN_EULER_ANGLES_TYPEDEFS(SCALAR_TYPE, SCALAR_POSTFIX) \

unsupported/Eigen/src/EulerAngles/EulerSystem.h

@@ -284,6 +284,7 @@ namespace Eigen
 
 #define EIGEN_EULER_SYSTEM_TYPEDEF(A, B, C) \
   /** \ingroup EulerAngles_Module */ \
+  /** \brief \noop                */ \
   typedef EulerSystem<EULER_##A, EULER_##B, EULER_##C> EulerSystem##A##B##C;
   
   EIGEN_EULER_SYSTEM_TYPEDEF(X,Y,Z)

unsupported/Eigen/src/IterativeSolvers/Scaling.h

@@ -13,7 +13,7 @@
 namespace Eigen {
 
 /**
-  * \ingroup IterativeSolvers_Module
+  * \ingroup IterativeLinearSolvers_Module
   * \brief iterative scaling algorithm to equilibrate rows and column norms in matrices
   * 
   * This class can be used as a preprocessing tool to accelerate the convergence of iterative methods