===================================================================
RCS file: /usr/OpenBSD/cvs/src/usr.bin/yacc/skeleton.c,v
retrieving revision 1.28
retrieving revision 1.29
diff -u -r1.28 -r1.29
--- src/usr.bin/yacc/skeleton.c	2007/09/03 21:14:58	1.28
+++ src/usr.bin/yacc/skeleton.c	2008/07/08 15:06:50	1.29
@@ -63,4 +63,5 @@
     "#endif",
     "#include <stdlib.h>",
+    "#include <string.h>",
     "#define YYBYACC 1",
     "#define YYMAJOR 1",
@@ -346,7 +347,10 @@
     "                YYPREFIX, yystate, yyn, yyrule[yyn]);",
     "#endif",
     "    yym = yylen[yyn];",
-    "    yyval = yyvsp[1-yym];",
+    "    if (yym)",
+    "        yyval = yyvsp[1-yym];",
+    "    else",
+    "        memset(&yyval, 0, sizeof yyval);",
     "    switch (yyn)",
     "    {",
     0