[vala] posix: Add SIG_DFL, SIG_ERR, and SIG_IGN

[Jürg Billeter <juergbi src gnome org>]

commit 74e54362621938798186e149ae9de6f0896cff6c
Author: Å?ukasz Pankowski <lukpank o2 pl>
Date:   Sat Oct 31 15:28:02 2009 +0100

    posix: Add SIG_DFL, SIG_ERR, and SIG_IGN
    
    Fixes bug 595872.

 vapi/posix.vapi |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 2d75b06..0d9bd81 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -931,6 +931,15 @@ namespace Posix {
 	public static delegate void sighandler_t (int signal);
 
 	[CCode (cheader_filename = "signal.h")]
+	public sighandler_t SIG_DFL;
+
+	[CCode (cheader_filename = "signal.h")]
+	public sighandler_t SIG_ERR;
+
+	[CCode (cheader_filename = "signal.h")]
+	public sighandler_t SIG_IGN;
+
+	[CCode (cheader_filename = "signal.h")]
 	public sighandler_t signal (int signum, sighandler_t? handler);
 
 	[CCode (cheader_filename = "stdio.h")]