http: Don't leak form_path on error
http: Don't leak form_path on error

Spotted by Coverity.

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

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