add const qualifier to most char* prototypes, handle ripple effect

p4raw-id: //depot/perl@2924

1 files changed, 1 insertions, 1 deletions

diff --git a/mg.c b/mg.c
index 76da1b4b84..ff9947a9b2 100644
--- a/mg.c
+++ b/mg.c
@@ -275,7 +275,7 @@ mg_find(SV *sv, int type)
 }
 
 int
-mg_copy(SV *sv, SV *nsv, char *key, I32 klen)
+mg_copy(SV *sv, SV *nsv, const char *key, I32 klen)
 {
     int count = 0;
     MAGIC* mg;