make the expensive ckWARN() be called as late as possible

reorganise
    if (ckWARN(FOO) && should_not_happen_condition)
to
    if (should_not_happen_condition && ckWARN(FOO))

p4raw-id: //depot/perl@25129

1 files changed, 1 insertions, 1 deletions

diff --git a/pad.c b/pad.c
index 5f04fd63b3..f60aeaf6dd 100644
--- a/pad.c
+++ b/pad.c
@@ -501,7 +501,7 @@ Perl_pad_check_dup(pTHX_ const char *name, bool is_our, const HV *ourstash)
     PADOFFSET	top, off;
 
     ASSERT_CURPAD_ACTIVE("pad_check_dup");
-    if (!ckWARN(WARN_MISC) || AvFILLp(PL_comppad_name) < 0)
+    if (AvFILLp(PL_comppad_name) < 0 || !ckWARN(WARN_MISC))
 	return; /* nothing to check */
 
     svp = AvARRAY(PL_comppad_name);