36460: Discard benign error when no one is reading from pipe

ChangeLog

@@ -1,3 +1,8 @@
+2015-09-10  Peter Stephenson  <p.stephenson@samsung.com>
+
+	* 36460: Test/E01options.ztst: Discard benign error on failure
+	to write to pipe with no one reading.
+
 2015-09-08  Oliver Kiddle  <opk@zsh.org>
 
 	36422: Src/compat.c: add missing unmeta()

Test/E01options.ztst

@@ -995,7 +995,7 @@
   print this is bar >bar
   fn() {
     local NULLCMD=cat READNULLCMD=cat
-    echo hello | >foo
+    { echo hello | >foo } 2>/dev/null
     cat foo
     <bar
   }