[Scip] BMS claims not freed memory for dynamic arrays

[Martin Bergner]

Hello all,

> Creation:
>     SCIP_CALL(SCIPcreatePtrarray(scip, &ptrarray));

> (...)
> 
> Free:
>     SCIPfreePtrarray(scip, &ptrarray)

this was only part of the truth: The first method was called in
PresolInitPre, the second one in PresolFree. Calling the
SCIPfreePtrarray function in PresolExitPre solved the problem.

Thanks to Kati for pointing out that the stage is indeed relevant.

Regards and thanks,
Martin