At the end, the case is never reached because
json_object_to_json_string_ext only produces
valid JSON strings and a string terminated by
'\' isn't a valid JSON string.
Change-Id: I58a6dc4d9c014487ff2dc85f7eb3dbf33ffea6b1 Signed-off-by: José Bollo <jose.bollo@iot.bzh>