PL_reg_name properly. Hopefuly this will fix it, but I don't have
access to any platform where I can test this directly.
p4raw-id: //depot/perl@30461
opargs
ppaddr
regkind
+reg_name
sig_name
sig_num
simple
Perl_sv_peek
Perl_hv_assert
PL_block_type
+ PL_reg_name
PL_watchaddr
PL_watchok
PL_watch_pvx