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, 2 insertions, 2 deletions

diff --git a/mg.c b/mg.c
index 0cb605230d..761bf73452 100644
--- a/mg.c
+++ b/mg.c
@@ -682,7 +682,7 @@ Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
     PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
     PERL_UNUSED_ARG(sv);
     PERL_UNUSED_ARG(mg);
-    Perl_croak_no_modify(aTHX);
+    Perl_croak_no_modify();
     NORETURN_FUNCTION_END;
 }
 
@@ -2477,7 +2477,7 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
              */
       croakparen:
             if (!PL_localizing) {
-                Perl_croak_no_modify(aTHX);
+                Perl_croak_no_modify();
             }
         }
         break;