make drag mfact compatible with pertag

dwm.c

@@ -1670,6 +1670,7 @@ void
 resizemouse(const Arg *arg)
 {
 	int ocx, ocy, nw, nh;
+	unsigned int i;
 	Client *c;
 	Monitor *m;
 	XEvent ev;
@@ -1713,6 +1714,15 @@ resizemouse(const Arg *arg)
 
 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
 				resize(c, c->x, c->y, nw, nh, 1);
+			else {
+				selmon->mfact = (double) (ev.xmotion.x_root - selmon->mx) / (double) selmon->ww;
+				for(i=0; i<LENGTH(tags); ++i)
+					if(selmon->tagset[selmon->seltags] & 1<<i)
+						selmon->pertag->mfacts[i+1] = selmon->mfact;
+				if(selmon->pertag->curtag == 0)
+					selmon->pertag->mfacts[0] = selmon->mfact;
+				arrange(selmon);
+			}
 			break;
 		}
 	} while (ev.type != ButtonRelease);
@@ -1720,8 +1730,6 @@ resizemouse(const Arg *arg)
 	if (c->isfloating || NULL == c->mon->lt[c->mon->sellt]->arrange) {
 		XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
 	} else {
-		selmon->mfact = (double) (ev.xmotion.x_root - selmon->mx) / (double) selmon->ww;
-		arrange(selmon);
 		XWarpPointer(dpy, None, root, 0, 0, 0, 0,
 			selmon->mx + (selmon->ww * selmon->mfact),
 			selmon->my + (selmon->wh / 2)