RFC: avoid a deprecation warning from numpy (implicit conversion from array to scalar)

Author: neutrinoceros

vip_hci/fm/negfc_simplex.py

@@ -792,7 +792,7 @@ def firstguess(cube, angs, psfn, planets_xy_coord, ncomp=1, fwhm=4,
                                      verbose=False)
             if force_rPA:
                 r_0[i_planet], theta_0[i_planet] = (r_pre, theta_pre)
-                f_0[i_planet] = res.x[:]
+                f_0[i_planet] = res.x.item()
             else:
                 r_0[i_planet] = res.x[0]
                 theta_0[i_planet] = res.x[1]