beremiz

MQTT: Fix warning when subscribing first topic from python.

16 months ago, Edouard Tisserant
089ecd14deb3
MQTT: Fix warning when subscribing first topic from python.

Ensure that message callback is already set before subscribing a topic from python.
<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="ERPC://localhost:61131">
<TargetType/>
<Libraries Enable_Native_Library="true" Enable_Python_Library="false"/>
</BeremizRoot>