pack.c: refix unpack base64

* pack.c (pack_unpack): increase buffer size to fix buffer overflow,
  and fix garbages just after unpacking without missing paddings.
  [Bug #8286]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40344 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
dir.c: not skip dot directories if matching

* dir.c (glob_helper): should skip dot directories only for recursion,
  but should not if matching to the given pattern.  [ruby-core:54387]
  [Bug #8283]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40345 b2dd03c8-39d4-4d8f-98ff-823fe69b080e