minor configure change

[Evan Martin]

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This should fix:
./configure: line 2895: test: =: unary operator expected

-- 
Evan Martin
martine@danga.com
http://neugierig.org

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Index: configure.ac
===================================================================
RCS file: /home/cvspub/wcmtools/memcached/configure.ac,v
retrieving revision 1.18
diff -u -r1.18 configure.ac
--- configure.ac	13 Aug 2003 01:32:02 -0000	1.18
+++ configure.ac	15 Aug 2003 19:04:24 -0000
@@ -10,7 +10,7 @@
 
 AC_ARG_WITH(libevent,
 	AC_HELP_STRING([--with-libevent=DIRECTORY],[base directory for libevent]))
-if test ${with_libevent+set} = set && test $with_libevent != no; then
+if test "${with_libevent}" != "no"; then
 	CFLAGS="$CFLAGS -I$with_libevent/include"
 	LDFLAGS="$LDFLAGS -L$with_libevent/lib"
 fi

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