Tweaks to memory_get_usage() and memory_get_peak_usage()

Howdy After working with a couple of projects, I found it a little annoying that I would have to call memory_get_usage() twice first for emalloc()'d memory and after again for real memory, so I made a small patch that allows retrieving both values in a single call[1]. The patch itself is rather simple, and does the same thing to memory_get_peak_usage(). It defines 3 constants: MEMORY_BOTH, MEMORY_EMALLOC & MEMORY_REAL. These allows code written prior this patch (if merged) to be compatible. Any objections for 7? [1] http://pastie.org/10115733 -- regards, Kalle Sommer Nielsen kalle@php.net