rmv context from Perl_croak_no_modify and Perl_croak_xs_usage

Remove the context/pTHX from Perl_croak_no_modify and Perl_croak_xs_usage.
For croak_no_modify, it now has no parameters (and always has been
no return), and on some compilers will now be optimized to a conditional
jump. For Perl_croak_xs_usage one push asm opcode is removed at the caller.
For both funcs, their footprint in their callers (which probably are hot
code) is smaller, which means a tiny bit more room in the cache. My text
section went from 0xC1A2F to 0xC198F after apply this. Also see
http://www.nntp.perl.org/group/perl.perl5.porters/2012/11/msg195233.html .

1 files changed, 1 insertions, 1 deletions

diff --git a/doop.c b/doop.c
index f64ebb0674..87bd180bc6 100644
--- a/doop.c
+++ b/doop.c
@@ -633,7 +633,7 @@ Perl_do_trans(pTHX_ SV *sv)
 
     if (SvREADONLY(sv) && !(PL_op->op_private & OPpTRANS_IDENTICAL)) {
         if (!SvIsCOW(sv))
-            Perl_croak_no_modify(aTHX);
+            Perl_croak_no_modify();
     }
     (void)SvPV_const(sv, len);
     if (!len)