With --without-xen, avoid warning about unused function.

* tests/statstest.c (testQuietError) [!WITH_XEN]: Don't define.

ChangeLog

+Fri Feb 22 13:32:11 CET 2008 Jim Meyering <meyering@redhat.com>
+
+	With --without-xen, avoid warning about unused function.
+	* tests/statstest.c (testQuietError) [!WITH_XEN]: Don't define.
+
 Thu Feb 21 19:22:10 CET 2008 Jim Meyering <meyering@redhat.com>
 
 	Rewrite openvzSetUUID.

tests/statstest.c

@@ -7,10 +7,13 @@
 #include "stats_linux.h"
 #include "internal.h"
 
-static void testQuietError(void *userData ATTRIBUTE_UNUSED, virErrorPtr error ATTRIBUTE_UNUSED)
+#if WITH_XEN
+static void testQuietError(void *userData ATTRIBUTE_UNUSED,
+                           virErrorPtr error ATTRIBUTE_UNUSED)
 {
     /* nada */
 }
+#endif
 
 #if __linux__ && WITH_XEN
 static int testDevice(const char *path, int expect)