merges r31344 from trunk into ruby_1_9_2.

--
* win32/win32.c (kill): accept 0 as pid, fixes #4596

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@31814 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/win32/win32.c b/win32/win32.c
index b1984f57fd..d696c0f016 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -3743,7 +3743,7 @@ kill(int pid, int sig)
     int ret = 0;
     DWORD err;
 
-    if (pid <= 0) {
+    if (pid < 0) {
 	errno = EINVAL;
 	return -1;
     }