uninitialized variable

* process.c (rb_spawn_process): get rid of usage of uninitialized
  variable.
  reported by Denis Denisov <denji0k AT gmail.com>.
* regexec.c (match_at): ditto.
* ext/win32ole/win32ole.c (ole_wc2mb_alloc, ole_vstr2wc, ole_mb2wc):
  ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
nkf.c: add semicolon

* ext/nkf/nkf-utf8/nkf.c (nkf_iconv_t): fix a missing semicolon.
  reported by Denis Denisov <denji0k AT gmail.com>.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49026 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parser.rl: check before use

* ext/json/parser/parser.rl (unescape_unicode): check if valid
  before bit-or assignments.
  reported by Denis Denisov <denji0k AT gmail.com>.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49027 b2dd03c8-39d4-4d8f-98ff-823fe69b080e