[IA64] sparse cleanups

0/NULL confusion and some missing UL on constants.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 51217d6..898a07d 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -851,7 +851,7 @@
 			return;
 		}
 	} while (unw_unwind(info) >= 0);
-	lp->bsp = 0;
+	lp->bsp = NULL;
 	lp->cfm = 0;
 	return;
 }