Dang. Forgot to include <config.h> - now it works

SpiralSound/Plugins/LADSPAPlugin/LADSPAPlugin.C

@@ -17,6 +17,8 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
+#include <config.h>
+
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>