min_temp for PureFluids causes problems

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The function min_temp gives values, which are beyond the valid range.

#using Cantera 2.1
import cantera as ct
w=ct.Water()

#this will cause an exception
w.TP=w.min_temp, 1e5

#now its ok
w.TP=w.min_temp+1e-5, 1e5

#but then we get trouble
w.cp_mass

RuntimeError: 
***********************************************************************
CanteraError thrown by Substance::set_T:
illegal temperature: 273.133
***********************************************************************

I would prefer to have with w.min_temp a value, which is valid for all operions 
on that fluid.

Thank you

Alfred

Original issue reported on code.google.com by alfred.m...@googlemail.com on 9 Nov 2013 at 12:08

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Original comment by yarmond on 12 Nov 2013 at 9:02

• Changed state: Accepted

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This issue was closed by revision r2575.

Original comment by yarmond on 12 Nov 2013 at 11:44

• Changed state: Fixed