psRealloc simply calls realloc without reference to the psAlloc mem manager

[rhl@…]

psRealloc calls realloc on a block that belongs to the psLib memory allocator; unfortunately,
that allocator assumes that blocks have sizes that are powers of two (up to 2^{16; but see bug 804)
and this is violated by a call to realloc().}

A simple fix is to call psAlloc to get the expanded memory block (if needed); I have implemented
this and will check it in after suitable consultation

[Paul Price]

* Bug 801 has been marked as a duplicate of this bug. *

[Paul Price]

Rolled back the psAlloc + copy solution (see bug 801) and instead added to the
top of p_psRealloc:

Ensure the size matches that of the recycle bin
int bin = getRecycleBin(size);
if (bin < N_RECYCLE_BINS) {

size = recycleBinSize[bin]; round-up size to next sized bin.

}

This ensures that the size returned from realloc() is a power of two.

Note that you now need to define PS_MEM_USE_RECYCLE at compile time to use
recycling bins.