parser: close file handle left opened

Close file handle left opened if parser.cfg is found and read from.
Found by cppcheck.

Signed-off-by: Steve Beattie <steve@nxnw.org>
Acked-by: John Johansen <john.johansen@canonical.com>

parser/parser_main.c

@@ -611,6 +611,7 @@ static int process_config_file(const char *name)
 
 	while ((c = getopt_long_file(f, long_options, &optarg, &o)) != -1)
 		process_arg(c, optarg);
+	fclose(f);
 	return 1;
 }