constify rb_encoding and OnigEncoding

* include/ruby/encoding.h: constify `rb_encoding` arguments.
* include/ruby/oniguruma.h: constify `OnigEncoding` arguments.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46309 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/numeric.c b/numeric.c
index 34abd1d90c..520b7a56c7 100644
--- a/numeric.c
+++ b/numeric.c
@@ -2626,7 +2626,7 @@ rb_int_pred(VALUE num)
 #define int_pred rb_int_pred
 
 VALUE
-rb_enc_uint_chr(unsigned int code, rb_encoding *enc)
+rb_enc_uint_chr(unsigned int code, const rb_encoding *enc)
 {
     int n;
     VALUE str;