Make inotify optional

This time keeping the ability to fall back to the old polling method.

src/WindowMaker.h

@@ -425,6 +425,9 @@ typedef struct WPreferences {
         unsigned int noautolaunch:1;   /* don't autolaunch apps */
         unsigned int norestore:1;      /* don't restore session */
         unsigned int create_stdcmap:1; /* create std colormap */
+#ifndef HAVE_INOTIFY
+	unsigned int nopolling:1;      /* don't poll the defaults database for changes */
+#endif
         unsigned int restarting:2;
     } flags;			       /* internal flags */
 } WPreferences;