trunk is failing on median tests

[robe]

Can someone fix this:

  Test: test_median_handles_3d_correctly ...passed
  Test: test_median_robustness ...median_test input MULTIPOINT ((1 -1 3), (1 0 2), (2 1 1)) (parsed MULTIPOINT(1 -1 3,1 0 2,2 1 1)) expected POINT(1 0 2) got POINT(1 0 2)
median_test input MULTIPOINT ZM ((0 0 20000 0.5),(0 0 59000 0.5),(0 48000 -20000 1.3),(0 -48000 -20000 1.3),(0 -3000 -3472.22222222222262644208967685699462890625 1),(0 3000 3472.22222222222262644208967685699462890625 1),(0 0 -1644.736842105263121993630193173885345458984375 1),(0 0 1644.736842105263121993630193173885345458984375 1)) (parsed MULTIPOINT(0 0 20000 0.5,0 0 59000 0.5,0 48000 -20000 1.3,0 -48000 -20000 1.3,0 -3000 -3472.22222222 1,0 3000 3472.22222222 1,0 0 -1644.73684211 1,0 0 1644.73684211 1)) expected POINT(0 0 0) got POINT(0 0 0)
FAILED

[Raul Marin]

Related to ​https://trac.osgeo.org/postgis/ticket/3997.

Should be fixed with ​https://github.com/postgis/postgis/pull/205 Since that fixes also an issue with an infinite loop (which changes a bit the code) feel free to cherry-pick the other to commits until review or let me know and I'll create different PRs.

[pramsey]

In 16375:

Fix build tests around geometric median (Raúl Marín Rodríguez)
Closes ​https://github.com/postgis/postgis/pull/205
Closes #4012