In Perl_load_module_nocontext(), ver can actually be NULL.

In Perl_load_module_nocontext(), ver can actually be NULL.
In Perl_hv_copy_hints_hv(), ohv can actually be NULL.
In Perl_sortsv(), Perl_sortsv_flags() and S_qsortsvu(), array can be
NULL (if the number of elements to sort is <= 1).
In Perl_save_nogv(), gv can not be NULL.
In Perl_sv_cmp() and Perl_sv_cmp_locale(), both SVs can be NULL.
In Perl_ptr_table_fetch(), the sv can be NULL.
In PerlIO_set_ptrcnt(), ptr can be NULL.

p4raw-id: //depot/perl@33287