[PD-dev] displaying when an arg has been overridden

[Hans-Christoph Steiner]

I just ran into a bug which I quite common in Pd, and thought of a  
simple, graphical way to show status which would make such bugs  
trivial to spot.  Basically, I had a [+ 17] which I had mistakenly  
input data on the right inlet.  I then was debugging the logic since  
I thought the [+ 17] was adding 17.

So I was thinking that whenever an argument is overridden by data on  
an inlet, the argument should change color to clearly display that  
that argument is no longer in effect.

Right now Pd is very black-and-white, and I support not adding  
extraneous colors.  But I think that we should be using color to show  
things, and this is a simple example where I think it makes sense.

.hc

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