dln_find.c: PATH_SEP

* dln_find.c (dln_find_exe_r): use PATH_SEP instead of hardcoding
  separators.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45596 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32.c: CharNextExA with cp

* win32/win32.c (dln_find_1): use CharNextExA() instead of CharNext()
  to respect the given code page.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45597 b2dd03c8-39d4-4d8f-98ff-823fe69b080e