Upgrading to Prolint 71: repair Roundtable integration

When you upgrade to Prolint 71 from an older Prolint release and you were already using the Roundtable integration, then you will experience errors until you make the following fix:

Locate in your Roundtable directory the compiled file "rtb_evnt.r" and delete it.

Locate in your Roundtable directory the sourcefile "rtb_evnt.p" and open it in your editor.
Find the line where prolint/rtb/custom_evnt.i is included:

   {prolint/rtb/custom_evnt.i}

and change it to

   {prolint/roundtable/91c/custom_evnt.i}

Optionally compile+save rtb_evnt.p.
That's all, you are ready now.

You may have noticed that directory "prolint/rtb" has been deleted and replaced by a new directory "prolint/roundtable" with subdirectories for several Roundtable versions.
"91c" should probably work for Roundtable versions 9.1a to 9.1c.
"101b" is made for Roundtable 10.1b and may work for other Roundtable versions too.