How to remove some warnings in sdbm.c??

Hi,
during the build of the latest perl, I've found some warnings, but I
don't know how to remove them...
Here are they:
sdbm.c(90) : warning C4013: 'malloc' undefined; assuming extern returning int
sdbm.c(100) : warning C4013: 'free' undefined; assuming extern returning int

I'm not very good at C and I can't swim through all those #if's, so if
there is some unemployed (or bored) C expert, here is job for him:)))

Ouch, I forgot. I'm using VC++ 5, under Win95.

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• How to remove some warnings in sdbm.c?? by Nikola Knezevic