Check to avoid calling iconv_close(-1) in openconnect_vpninfo_free
Check to avoid calling iconv_close(-1) in openconnect_vpninfo_free

Signed-off-by: Chad Catlett <c34c009102e60d77975598e1f414f8a701c22d0b@catlett.info>
Signed-off-by: David Woodhouse <b460d66aaf00c296a3db1c1d9eeafc081d5f7d70@intel.com>

nmav/openconnect-mine,chadcatlett/openconnect,cernekee/openconnect,matlockx/openconnect,lins05/openconnect,mtmiller/openconnect,lins05/openconnect,matlockx/openconnect,matlockx/openconnect,chadcatlett/openconnect,chadcatlett/openconnect,nmav/openconnect-mine,matlockx/openconnect,liiir1985/openconnect,cernekee/openconnect,mveplus/openconnect-client,cernekee/openconnect,brandt/openconnect,lins05/openconnect,don-johnny/openconnect,liiir1985/openconnect,nmav/openconnect-mine,liiir1985/openconnect,mtmiller/openconnect,brandt/openconnect,atyndall/openconnect,don-johnny/openconnect,mveplus/openconnect-client,brandt/openconnect,don-johnny/openconnect,atyndall/openconnect,liiir1985/openconnect,chadcatlett/openconnect,lins05/openconnect,mtmiller/openconnect,nmav/openconnect-mine,atyndall/openconnect,brandt/openconnect,atyndall/openconnect,mtmiller/openconnect,mveplus/openconnect-client,mveplus/openconnect-client,cernekee/openconnect,don-johnny/openconnect