ia64 gas: Remove unnecessary init

[Alan Modra]

The whole struct is cleared by alloc_record.

	* config/tc-ia64.c (output_prologue, output_prologue_gr): Don't
	zero r.record.r.mask.

diff --git a/gas/config/tc-ia64.c b/gas/config/tc-ia64.c
index 2c5e45f0491..a4555046492 100644
--- a/gas/config/tc-ia64.c
+++ b/gas/config/tc-ia64.c
@@ -1760,7 +1760,6 @@ static unw_rec_list *
 output_prologue (void)
 {
   unw_rec_list *ptr = alloc_record (prologue);
-  memset (&ptr->r.record.r.mask, 0, sizeof (ptr->r.record.r.mask));
   return ptr;
 }
 
@@ -1768,7 +1767,6 @@ static unw_rec_list *
 output_prologue_gr (unsigned int saved_mask, unsigned int reg)
 {
   unw_rec_list *ptr = alloc_record (prologue_gr);
-  memset (&ptr->r.record.r.mask, 0, sizeof (ptr->r.record.r.mask));
   ptr->r.record.r.grmask = saved_mask;
   ptr->r.record.r.grsave = reg;
   return ptr;

-- 
Alan Modra
Australia Development Lab, IBM