pack.c: round down too long uuencode width

* pack.c (pack_pack): round down too long uuencode width.  folding
  width in uuencode format cannot be longer than 63 bytes.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36450 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/pack.c b/pack.c
index 895d97c770..5b63c3f242 100644
--- a/pack.c
+++ b/pack.c
@@ -927,6 +927,8 @@ pack_pack(VALUE ary, VALUE fmt)
 	    }
 	    if (len <= 2)
 		len = 45;
+	    else if (len > 63 && type == 'u')
+		len = 63;
 	    else
 		len = len / 3 * 3;
 	    while (plen > 0) {