From 872da96f9ef4aacf6560668109f6d1959afd884d Mon Sep 17 00:00:00 2001
From: Mike Gerwitz <mike.gerwitz@rtspecialty.com>
Date: Tue, 19 Dec 2017 11:00:52 -0500
Subject: [PATCH] summary: Allow empty symbol lookups

This is just a temporary workaround for a failed lookup; no time to debug at
the moment.

* src/current/summary.xsl (preproc:sym-lookup): Allow empty sequence as
  return value.
---
 src/current/summary.xsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/current/summary.xsl b/src/current/summary.xsl
index 400dab2d..fbe63051 100644
--- a/src/current/summary.xsl
+++ b/src/current/summary.xsl
@@ -2241,7 +2241,7 @@
   linked, in which case it should not be rendered at all.  Maybe we should
   output those somewhere.
 -->
-<xsl:function name="preproc:sym-lookup" as="element( preproc:sym )">
+<xsl:function name="preproc:sym-lookup" as="element( preproc:sym )?">
   <xsl:param name="name" as="xs:string" />
 
   <xsl:sequence select="$program/l:dep/preproc:sym[ @name=$name ]" />