print/luatex configure problem

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

During print/luatex's configure phase on Mac OS X using clang, I get

checking requested system `kpathsea' library... ok
checking requested system `zlib' library... ok
checking requested system `libpng' library... ok
checking requested system `poppler' library... ok
checking requested system `zziplib' library... failed
configure: error: some requested system libraries failed
*** Error code 1

Stop.
bmake: stopped in /Users/ef/local/build/pkgsrc/print/luatex

This patch

--- configure.orig      2013-10-05 15:31:48.000000000 +0200
+++ configure   2013-10-05 15:39:24.000000000 +0200
@@ -18147,7 +18147,7 @@
 fi
 
 if $PKG_CONFIG poppler --atleast-version=0.10; then
-  POPPLER_VERSION='-DPOPPLER_VERSION=\"'`$PKG_CONFIG poppler --modversion`'\"'
+  POPPLER_VERSION='-DPOPPLER_VERSION="'`$PKG_CONFIG poppler --modversion`'"'
   XPDF_INCLUDES="$POPPLER_VERSION `$PKG_CONFIG poppler --cflags`"
   XPDF_LIBS=`$PKG_CONFIG poppler --libs`
 elif test "x$need_xpdf:$with_system_xpdf" = xyes:yes; then
@@ -18155,7 +18155,7 @@
 fi
 
 if $PKG_CONFIG poppler --atleast-version=0.12; then
-  POPPLER_VERSION='-DPOPPLER_VERSION=\"'`$PKG_CONFIG poppler --modversion`'\"'
+  POPPLER_VERSION='-DPOPPLER_VERSION="'`$PKG_CONFIG poppler --modversion`'"'
   POPPLER_INCLUDES="$POPPLER_VERSION `$PKG_CONFIG poppler --cflags`"
   POPPLER_LIBS=`$PKG_CONFIG poppler --libs`
 elif test "x$need_poppler:$with_system_poppler" = xyes:yes; then

seems to help, but I'm not an expert in the field of autoconf.