merges r20564 from trunk into ruby_1_9_1.

* pack.c (pack_pack): 'u0' is not special differently from 'm0'.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@20669 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/pack.c b/pack.c
index 119a83b1a..ae0218afc 100644
--- a/pack.c
+++ b/pack.c
@@ -903,7 +903,7 @@ pack_pack(VALUE ary, VALUE fmt)
 	    ptr = RSTRING_PTR(from);
 	    plen = RSTRING_LEN(from);
 
-	    if (len == 0) {
+	    if (len == 0 && type == 'm') {
 		encodes(res, ptr, plen, type, 0);
 		ptr += plen;
 		break;