ia64: fix build breakage in asm/thread_info.h

In commit 504f52b5
    mm: NUMA aware alloc_task_struct_node()

Eric Dumazet forgot a "\".  Add it.
Signed-off-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>

arch/ia64/include/asm/thread_info.h

@@ -91,7 +91,7 @@ struct thread_info {
 					     KERNEL_STACK_SIZE_ORDER);		\
 	struct task_struct *ret = page ? page_address(page) : NULL;		\
 										\
-	ret;
+	ret;									\
 })
 #define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)