Suppress fork part of socket test when we can't fork.

Lib/test/test_socket.py

@@ -8,7 +8,7 @@
 #	sktobj.shutdown()
 
 
-from test_support import verbose
+from test_support import verbose, TestFailed
 import socket
 import os
 import time
@@ -89,15 +89,17 @@ except socket.error:
     pass
 
 
+canfork = hasattr(os, 'fork')
 try:
     PORT = 50007
-    if os.fork():
+    if not canfork or os.fork():
 	# parent is server
 	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 	s.bind(hostname, PORT)
 	s.listen(1)
 	if verbose:
 	    print 'parent accepting'
+	if canfork:
 	    conn, addr = s.accept()
 	    if verbose:
 		print 'connected by', addr
@@ -138,5 +140,5 @@ try:
 	    s.close()
 	finally:
 	    os._exit(1)
-except socket.error:
-    pass
+except socket.error, msg:
+    raise TestFailed, msg