Fix fb.h breaking compilation of userspace programs

diff -Naur linux-2.6.9-rc1/include/linux/list.h linux-2.6.9-rc1-a/include/linux/list.h
@@ -1,6 +1,10 @@
 #ifndef _LINUX_LIST_H
 #define _LINUX_LIST_H
 
+struct list_head {
+	struct list_head *next, *prev;
+};
+
 #ifdef __KERNEL__
 
 #include <linux/stddef.h>

@@ -25,10 +29,6 @@
  * using the generic single-entry routines.
  */
 
-struct list_head {
-	struct list_head *next, *prev;
-};
-
 #define LIST_HEAD_INIT(name) { &(name), &(name) }
 
 #define LIST_HEAD(name) \

@@ -696,7 +696,5 @@
 		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
 	     pos = rcu_dereference(pos->next))
 
-#else
-#warning "don't include kernel headers in userspace"
 #endif /* __KERNEL__ */
 #endif