Ticket #3440: (find_file): fix memory leak.

Find_parameter() allocate start_dir but object will never freed.

Testcase: search file.

(Found by LeakSanitizer.)

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

src/filemanager/find.c

@@ -1778,6 +1778,7 @@ find_file (void)
         dirname = filename = NULL;
         is_start = FALSE;
         v = do_find (start_dir, start_dir_len, ignore_dirs, pattern, content, &dirname, &filename);
+        g_free (start_dir);
         g_free (ignore_dirs);
         g_free (pattern);