[pypy-dev] _pypy_wait.py fixes

[Da_Blitz]

Hi

when calling wait3 or wait4 in the os module a ctypes error about 
return types is printed. a quick patch is included bellow to silence 
the message

---
Da_Blitz

diff -r eaba7adf5188 lib_pypy/_pypy_wait.py
--- a/lib_pypy/_pypy_wait.py    Thu Apr 28 11:46:10 2011 +0200
+++ b/lib_pypy/_pypy_wait.py    Tue May 17 22:43:29 2011 +1000
@@ -8,8 +8,10 @@
 c_wait3 = libc.wait3

 c_wait3.argtypes = [POINTER(c_int), c_int, POINTER(_struct_rusage)]
+c_wait3.restype = c_int

 c_wait4 = libc.wait4
+c_wait4.restype = c_int

 c_wait4.argtypes = [c_int, POINTER(c_int), c_int, POINTER(_struct_rusage)]