[sr-dev] git:master:ce19d921: siptrace: turn warn into info message about loading dlg api

Daniel-Constantin Mierla writes: Info is better than warning, but I would prefer no message at all. These kind of things are in README file and don't need to appear in syslog. The code should check if dialog module is available when tracing of a dialog is attempted and issue an error if that is not the case. There are lots of other similar cases when a function cannot be executed if required modules are not loaded or if a certain module variable is not set accordingly. -- Juha