[nrf fromtree] net: lib: coap_client: All error cases should be reported to callback

When the client fails when parsing the response and we stop proceeding,
we should report that to the application.

Signed-off-by: Seppo Takalo <[email protected]>
(cherry picked from commit f72d634)

Author: SeppoTakalo

subsys/net/lib/coap/coap_client.c

@@ -950,7 +950,10 @@ static int handle_response(struct coap_client *client, const struct coap_packet
 		}
 	}
 fail:
-	if (ret < 0 || !internal_req->is_observe) {
+	if (ret < 0) {
+		report_callback_error(internal_req, ret);
+	}
+	if (!internal_req->is_observe) {
 		release_internal_request(internal_req);
 	}
 	return ret;