use "l" instead of "l_cur" from google's JSON response.  "l_cur" includes the currency symbol for non-dollar denominated stocks.


git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@419 edb9625f-4e0d-4859-8d74-9fd3b1da38cb