Changes in fe_xyz_shape_1D.C for -Wshadow.
Changes in fe_xyz_shape_1D.C for -Wshadow.

Issue #24.

Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh