KSP: fix PIPECG for norm types PRECONDITIONED and UNPRECONDITIONED

Norm type NATURAL and NONE did not need fixing.  This bug did not appear
in the initial patch from Pieter Ghysels, but was introduced by
overzealous reformatting.
Merge branch 'maint'

* maint:
  KSP: fix PIPECG for norm types PRECONDITIONED and UNPRECONDITIONED