[Rd] Bogus warning in splinefun (PR#13954)

[P.V.Dunmore at massey.ac.nz]

Full_Name: Paul Dunmore
Version: 2.9.2
OS: Windows
Submission from: (NULL) (99.236.3.129)


The statement rm(x,y,nx,ux,o,method,iMeth) at line 95 in splinefun.R often
throws a warning because ux is not found (it is only conditionally defined at
line 35). spline.R handles this correctly, with rm(ux) at the end of the
conditional block.