Fix version access for libmemcached older than 1.0.8.

Author: andreiz

php_memcached.c

@@ -2642,10 +2642,17 @@ static memcached_return php_memc_do_version_callback(const memcached_st *ptr, me
 	struct callbackContext* context = (struct callbackContext*) in_context;
 
 	hostport_len = spprintf(&hostport, 0, "%s:%d", memcached_server_name(instance), memcached_server_port(instance));
+#if defined(LIBMEMCACHED_VERSION_HEX) && LIBMEMCACHED_VERSION_HEX >= 0x01000008
 	version_len = snprintf(version, sizeof(version), "%d.%d.%d",
 				memcached_server_major_version(instance),
 				memcached_server_minor_version(instance),
 				memcached_server_micro_version(instance));
+#else
+	version_len = snprintf(version, sizeof(version), "%d.%d.%d",
+				instance->major_version,
+				instance->minor_version,
+				instance->micro_version);
+#endif
 
 	add_assoc_stringl_ex(context->return_value, hostport, hostport_len+1, version, version_len, 1);
 	efree(hostport);