audit: convert all sessionid declaration to unsigned int

Right now the sessionid value in the kernel is a combination of u32,
int, and unsigned int.  Just use unsigned int throughout.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 5cd0f09..a143df5 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -95,7 +95,7 @@
 #ifdef CONFIG_AUDITSYSCALL
 #define INIT_IDS \
 	.loginuid = INVALID_UID, \
-	.sessionid = -1,
+	.sessionid = (unsigned int)-1,
 #else
 #define INIT_IDS
 #endif