PR28826 x86_64 ld segfaults building xen

[Alan Modra]

Fallout from commit e86fc4a5bc37

	PR 28826
	* coffgen.c (coff_write_alien_symbol): Init dummy to zeros.

diff --git a/bfd/coffgen.c b/bfd/coffgen.c
index 293fce2baf3..bec1a424831 100644
--- a/bfd/coffgen.c
+++ b/bfd/coffgen.c
@@ -1092,6 +1092,7 @@ coff_write_alien_symbol (bfd *abfd,
 	memset (isym, 0, sizeof (*isym));
       return true;
     }
+  memset (dummy, 0, sizeof dummy);
   native = dummy;
   native->is_sym = true;
   native[1].is_sym = false;

-- 
Alan Modra
Australia Development Lab, IBM