From cf126b51e92283d2178b66db415491e5203e7129 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sat, 21 Jan 2012 13:01:14 -0500
Subject: Fix unquoted operand to '['.

---
diff --git a/lib/controlfields b/lib/controlfields
index aaaf668..12e3c71 100644
--- a/lib/controlfields
+++ b/lib/controlfields
@@ -88,7 +88,7 @@ oh_get_field()
 	# Parse the control file.
 	_value=''
 	while read -r _line; do
-		if [ -z ${_value} ]; then
+		if [ -z "${_value}" ]; then
 			_value=$(echo "${_line}" | sed -n \
 			"s/^${_field}:[[:space:]]*\(.*\)[[:space:]]*$/\\1/p")
 		else
--
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