Dead code in static filter Power_side_of_oriented_power_sphere_3

[mglisse]

https://github.com/CGAL/cgal/blame/187409888bd8590ad71f2a4912f53d9014a6cc27/Filtered_kernel/include/CGAL/Filtered_kernel/internal/Static_filters/Power_side_of_oriented_power_sphere_3.h#L374
As far as I can see, int_tmp_result can only be ±1 (line 348 or 354), and cmp is a copy, so the comparison cmp!=0 should always be true. Since the if branch ends with a return, this suggests that the next 170 lines are unreachable. Did I misread the code?
(if I was more serious, I would add an assertion and run some tests to confirm, or check if there is a coverage report of CGAL's testsuite somewhere online)
See also #2067 since this is the version with 4 points.

[MaelRL]

Smells like #5207?

[mglisse]

Ah, yes, same generator, similar strange code for another predicate. I had completely forgotten about #5207.