Made NtDelayExecution with a 0 timeout yield the CPU, as it is
supposed to.

diff --git a/configure b/configure
index 2bb7b49..b9ef8db 100755
--- a/configure
+++ b/configure
@@ -16146,6 +16146,7 @@
 
 
 
+
 for ac_func in \
 	_lwp_create \
 	_lwp_self \
@@ -16188,6 +16189,7 @@
 	pwrite \
 	readlink \
 	rfork \
+	sched_yield \
 	select \
 	sendmsg \
 	settimeofday \