[IA64] fix warning unused variable `g'

4ac0068f44f192f2de95a7bb36df3e19767a45fb forgot to delete
the declaration of this variable which is no longer used.

Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 9a9c1bd..4b19d04 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -587,7 +587,7 @@
 static struct task_struct *
 find_thread_for_addr (struct task_struct *child, unsigned long addr)
 {
-	struct task_struct *g, *p;
+	struct task_struct *p;
 	struct mm_struct *mm;
 	struct list_head *this, *next;
 	int mm_users;