[PATCH] ia64: desc_empty thinko/typo fix

Just a one-byter for an ia64 thinko/typo - already fixed for i386 and x86_64.
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-ia64/processor.h

@@ -210,7 +210,7 @@ struct desc_struct {
 	unsigned int a, b;
 };
 
-#define desc_empty(desc)		(!((desc)->a + (desc)->b))
+#define desc_empty(desc)		(!((desc)->a | (desc)->b))
 #define desc_equal(desc1, desc2)	(((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
 
 #define GDT_ENTRY_TLS_ENTRIES	3