Small error in LFPPDofHandling

[enricomiletto]

Hello,
I think for a S_2^0 space there should also be 1 dof for every quad, not only every edge.

NPDECODES/homeworks/LFPPDofHandling/mysolution/lfppdofhandling_main.cc

Lines 33 to 39 in 47b4fe6

	// and for the quadratic LFES, S_2^0, edges also have 1 dof
	ndof_edge = 1;
	lf::assemble::UniformFEDofHandler quad_dofh(
	mesh, {{lf::base::RefEl::kPoint(), ndof_node},
	{lf::base::RefEl::kSegment(), ndof_edge},
	{lf::base::RefEl::kTria(), ndof_tria},
	{lf::base::RefEl::kQuad(), ndof_quad}});

Cheers,
Enrico