[Bug libstdc++/83140] assoc_legendre returns negated value when m is odd

[emsr at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83140

emsr at gcc dot gnu.org changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-05-01
     Ever confirmed|0                           |1