fixed Bug130593 fixed compilation warning

* configure.in: fixed Bug130593
* xmlwriter.c: fixed compilation warning
diff --git a/configure.in b/configure.in
index a3d1f57..38eada7 100644
--- a/configure.in
+++ b/configure.in
@@ -372,7 +372,7 @@
 		    echo could not find python$PYTHON_VERSION/Python.h
 		fi
 	    fi
-	    if ! test -d "$PYTHON_SITE_PACKAGES"
+	    if test ! -d "$PYTHON_SITE_PACKAGES"
 	    then
 		    PYTHON_SITE_PACKAGES=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_python_lib()"`
 	    fi