use .Va for global variables, and .Vt where the type is included

src/lib/libc/stdlib/malloc.3

@@ -30,9 +30,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: malloc.3,v 1.90 2015/03/14 08:07:17 tedu Exp $
+.\"	$OpenBSD: malloc.3,v 1.91 2015/09/14 13:08:01 schwarze Exp $
 .\"
-.Dd $Mdocdate: March 14 2015 $
+.Dd $Mdocdate: September 14 2015 $
 .Dt MALLOC 3
 .Os
 .Sh NAME
@@ -54,8 +54,7 @@
 .Fn realloc "void *ptr" "size_t size"
 .Ft void
 .Fn free "void *ptr"
-.Ft char * Ns
-.Va malloc_options ;
+.Vt char *malloc_options ;
 .Sh DESCRIPTION
 The
 .Fn malloc