bugfix: the matrix is squared, hence there is now variable 'm' holding the...

bugfix: the matrix is squared, hence there is now variable 'm' holding the number of columns.  Patch by Uli Sack

[[Imported from SVN: r1460]]

dune/istl/diagonalmatrix.hh

@@ -481,7 +481,7 @@ namespace Dune {
     {
 #ifdef DUNE_FMatrix_WITH_CHECKING
       if (i<0 || i>=n) DUNE_THROW(FMatrixError,"row index out of range");
-      if (j<0 || j>=m) DUNE_THROW(FMatrixError,"column index out of range");
+      if (j<0 || j>=n) DUNE_THROW(FMatrixError,"column index out of range");
 #endif
       return i==j;
     }

dune/istl/scaledidmatrix.hh

@@ -447,7 +447,7 @@ namespace Dune {
     {
 #ifdef DUNE_FMatrix_WITH_CHECKING
       if (i<0 || i>=n) DUNE_THROW(FMatrixError,"row index out of range");
-      if (j<0 || j>=m) DUNE_THROW(FMatrixError,"column index out of range");
+      if (j<0 || j>=n) DUNE_THROW(FMatrixError,"column index out of range");
 #endif
       return i==j;
     }