Fix for postmaster.c function win32_waitpid(int *exitstatus) call to

Fix for postc function win32_waitpid(int *exitstatus) call to
Win32 WaitForMultipleObjects:

	ret = WaitForMultipleObjects(win32_numChildren, win32_childHNDArray,
	FALSE, 0);

Problem is 'win32_numChildren' could be more then 64 ( function supports
), problem basically arise ( kills postgres ) when you create more then
64 connections and terminate some of them sill leaving more then 64.

Claudio Natoli