[patch] Eliminate warnings in hcreate_r.c

[Ralf Corsepius]

Hi,

I am applying the patch below as "obvious".

It #ifdef's 0 some unused variables, gcc is complaining about.

Instead of deleting these variables, I am using #ifdef 0, because the 
places the variables would be used later, have been #ifdef'ed 0 before.

Ralf
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