*ported fixes for crasher when sending a "dsp" message to tilde objects.  Backported from Pd Vanilla commits [8019b5] and [5769c5]

*fixed bug where patches with relative paths and multiple patches did not open properly within the existing instance of pd-l2ork

*tested and fixed compliance with ports of sarcduino objects so that their channel numbers correspond with those on arduino uno board

*fixed intermittent problem in k12 mode where edit/play button got stuck because ctrl key got gobbled up by a popup dialog or new window

* suppress printing the full list of classes when using the "print" method with [pdinfo] (just show number of loaded classes and an informative message)

fixed draw_getpathrect so that poorly formed path instructions don't end up trying to read nonexistent elements from sc_vec

* disabled warnings about unused parameters (which are pointless) & enabled warnings about other unused local variables (which allow to find dead code)