Zero out the initial header instoptions.

diff --git a/assembler/gram.y b/assembler/gram.y
index 4bd7bfc..e0ffe43 100644 (file)
--- a/assembler/gram.y
+++ b/assembler/gram.y
@@ -516,6 +516,9 @@ instoption_list: instoption instoption_list
                  }
                }
                | /* empty, header defaults to zeroes. */
+               {
+                 bzero(&$$, sizeof($$));
+               }
 ;
 
 /* XXX: fill me in. alignctrl, comprctrl, threadctrl, depctrl, maskctrl,