allow for finer grids in the boundary-handling code

[[Imported from SVN: r9649]]

cosserat-continuum.cc

@@ -186,7 +186,7 @@ int main (int argc, char *argv[]) try
             neumannNodes[grid->leafIndexSet().index(*vIt)][0] = true;
 #endif
 #if 1   // Boundary conditions for the shearing/wrinkling example
-        if (vIt->geometry().corner(0)[1] < 1e-3  or vIt->geometry().corner(0)[1] > upper[1]-1e-3 ) {
+        if (vIt->geometry().corner(0)[1] < 1e-4  or vIt->geometry().corner(0)[1] > upper[1]-1e-4 ) {
             // Only translation dofs are Dirichlet
             for (int j=0; j<3; j++)
                 dirichletNodes[grid->leafIndexSet().index(*vIt)][j] = true;