comdat_hash memory leaks

[Alan Modra]

I missed another field that needs freeing.  Also, oss-fuzz found a
case with a C_FILE sym using multiple auxents for a long file name
which overflowed the single auxent buffer.  I'm going to fix that
problem in swap_aux_in too, but we may as well avoid it here too,
saving unnecessary work.

	* coffcode.h (comdat_delf): Free comdat_name.
	(fill_comdat_hash): Only look at symbols with one auxent.

diff --git a/bfd/coffcode.h b/bfd/coffcode.h
index 03c1788a1c9..908dc93c64a 100644
--- a/bfd/coffcode.h
+++ b/bfd/coffcode.h
@@ -872,6 +872,7 @@ static void
 comdat_delf (void *ent)
 {
   struct comdat_hash_entry *e = ent;
+  free (e->comdat_name);
   free (e->symname);
   free (e);
 }
@@ -964,7 +965,7 @@ fill_comdat_hash (bfd *abfd)
 
       if (*slot == NULL)
 	{
-	  if (isym.n_numaux == 0)
+	  if (isym.n_numaux != 1)
 	    aux.x_scn.x_comdat = 0;
 	  else
 	    {

-- 
Alan Modra
Australia Development Lab, IBM