[Polyworld-cvs] fix mem corruption: do not use c_str() on temporary strings returned

[sean <ri...@us...>]

Log Message:
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fix mem corruption: do not use c_str() on temporary strings returned from functions.

Modified Files:
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    polyworld/proplib:
        cppprops.cp (r1.3 -> r1.4)
        dom.cp (r1.4 -> r1.5)