add new file diagonalmatrix.hh

[[Imported from SVN: r962]]

istl/Makefile.am

@@ -7,7 +7,7 @@ istl_HEADERS = allocator.hh basearray.hh bcrsmatrix.hh bvector.hh gsetc.hh io.hh
 	ilu.hh operators.hh preconditioners.hh solvers.hh indexset.hh communicator.hh remoteindices.hh mpitraits.hh \
 	interface.hh indicessyncer.hh matrixindexset.hh selection.hh plocalindex.hh localindex.hh scalarproducts.hh \
 	solvercategory.hh bdmatrix.hh matrixutils.hh schwarz.hh owneroverlapcopy.hh matrix.hh supermatrix.hh superlu.hh \
-	pardiso.hh overlappingschwarz.hh scaledidmatrix.hh
+	pardiso.hh overlappingschwarz.hh scaledidmatrix.hh diagonalmatrix.hh
 
 
 include $(top_srcdir)/am/global-rules