TT::Settings with Length cause errors

Centercode

Cannot catch any errors in Sketchup::read_default, as the exceptions are raised on the C-side by the use of eval.

Weird Example:
Sketchup.write_default("TEST","test",1.0)
x = Sketchup.read_default("TEST","test",1.0)
no issues, upon read, a Float is returned. But try to send a Length ...
Sketchup.write_default("TEST","test",1.0.to_l)
x = Sketchup.read_default("TEST","test",1.0.to_l)

Error: #<SyntaxError: <main>: syntax error, unexpected tIDENTIFIER, expecting end-of-input
~ 25mm
      ^>
Also, TTLib2, "settings.rb", line 57
x = x.to_l if default.is_a?(Length)
Your passing Float literals from the QuadFace plugin. The is_a?(Length) would work prior to v14, but Length is no longer a subclass of Float.

Perhaps safer now as:
x = x.to_l if default.is_a?(Numeric) && x.respond_to?(:to_l)

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