elc_file_selector_button: free allocated path name

Summary:
Currently path is strdup() when getting real path, but it is not freed
in some cases.

@fix

Reviewers: seoz, Hermet, woohyun, cedric

Reviewed By: cedric

Differential Revision: https://phab.enlightenment.org/D3194

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>

legacy/elementary/src/lib/elc_fileselector_button.c

@@ -463,6 +463,7 @@ _elm_fileselector_button_elm_interface_fileselector_selected_set(Eo *obj EINA_UN
              free(path);
              return EINA_FALSE;
           }
+        free(path);
      }
 
    eina_stringshare_replace(&sd->fsd.selection, _path);