Datatype fix

src/dwm.c

@@ -137,7 +137,7 @@ struct Monitor {
 	int mx, my, mw, mh;   /* screen size */
 	int wx, wy, ww, wh;   /* window area  */
 	int gappx;            /* gaps between windows */
-	unsigned int gapidx;	/* gap mode index */
+	int gapidx;			  /* gap mode index */
 	unsigned int seltags;
 	unsigned int sellt;
 	unsigned int tagset[2];