Move reflow into PosAnimation.stop so users don't have to implement it themselves.

src/dom/PosAnimation.js

@@ -34,6 +34,7 @@ L.PosAnimation = L.Class.extend({
 
 		L.DomUtil.setPosition(this._el, this._getPos());
 		this._onTransitionEnd();
+		L.Util.falseFn(this._container.offsetWidth); // force reflow in case we are about to start a new animation
 	},
 
 	// you can't easily get intermediate values of properties animated with CSS3 Transitions,

src/map/anim/Map.PanAnimation.js

@@ -10,7 +10,6 @@ L.Map.include({
 
 			if (this._panAnim) {
 				this._panAnim.stop();
-				L.Util.falseFn(this._container.offsetWidth); // force reflow
 			}
 
 			var done = (zoomChanged ?