Modifications made to the ZLib library

The prototypes for memory allocation in the PNG library were mentioned as being modified;

voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void   zcfree  OF((voidpf opaque, voidpf ptr));

zutil.cpp

The following function excerpts have been taken from zutil.cpp, where modifications are marked "//here"

voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
{
    if (opaque) items += size - size; /* make compiler happy */
/*
    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
                              (voidpf)calloc(items, size);
*/
	return img_malloc(items * size);							//Here
}

void  zcfree (voidpf opaque, voidpf ptr)
{
/*
    free(ptr);
*/
	img_free(ptr);												//Here
    if (opaque) return; /* make compiler happy */
}