[PD-dev] Feature Idea: turn "Find last error..." into a linked list

[Hans-Christoph Steiner]

I just looked around the code for pd_error() and "Find last error..."
and it looks really easy to turn that into a linked list of errors and
their respective objects.  This would allow all sorts of exciting
possibilities, like an unlimited "Find previous error...".  Or something
that I find even more exciting:

- create pd_warning() to match pd_error()
- use pd_warning() for any relevant message
- have the Pd window log keep track of the error #
- double-click the error message in the Pd window to find the object

.hc