cunit tests cleanup unused variables, all warnings

[robe]

I know these aren't real issues, but the warnings are creating noise on my compiler output.

CAn we get rid of these unused variables.

cu_measures.c: In function 'test_lw_dist2d_pt_arc':
cu_measures.c:447:6: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
  int rv;
      ^
cu_measures.c: In function 'test_lw_dist2d_seg_arc':
cu_measures.c:507:6: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
  int rv;
      ^
cu_measures.c: In function 'test_lw_dist2d_arc_arc':
cu_measures.c:580:6: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
  int rv;
      ^
cu_measures.c: In function 'test_lw_dist2d_pt_ptarrayarc':
cu_measures.c:685:6: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
  int rv;
      ^
cu_measures.c: In function 'test_lw_dist2d_ptarray_ptarrayarc':
cu_measures.c:759:6: warning: variable 'rv' set but not used [-Wunused-but-set-variable]
  int rv;

[pramsey]

This seems done