[IA64] ptrace.c small comment fix

Seems like I can't spll...
Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/ptrace.c

@@ -1374,7 +1374,7 @@ ptrace_disable (struct task_struct *child)
 {
 	struct ia64_psr *child_psr = ia64_psr(ia64_task_regs(child));
 
-	/* make sure the single step/take-branch tra bits are not set: */
+	/* make sure the single step/taken-branch trap bits are not set: */
 	child_psr->ss = 0;
 	child_psr->tb = 0;
 }