only call Perl_re_printf() under -DDEBUGGING

This caused link failures on Win32 with MSVC.

1 files changed, 2 insertions, 4 deletions

diff --git a/regexec.c b/regexec.c
index 764e336410..4df1dc6de9 100644
--- a/regexec.c
+++ b/regexec.c
@@ -2726,11 +2726,9 @@ S_reg_set_capture_string(pTHX_ REGEXP * const rx,
     if (flags & REXEC_COPY_STR) {
 #ifdef PERL_ANY_COW
         if (SvCANCOW(sv)) {
-            if (DEBUG_C_TEST) {
-                Perl_re_printf( aTHX_
+            DEBUG_C(Perl_re_printf( aTHX_
                               "Copy on write: regexp capture, type %d\n",
-                              (int) SvTYPE(sv));
-            }
+                                    (int) SvTYPE(sv)));
             /* Create a new COW SV to share the match string and store
              * in saved_copy, unless the current COW SV in saved_copy
              * is valid and suitable for our purpose */