[SharpDX] Don't call RenderForm.OnUserResized event when cachedSize is empty
[SharpDX] Don't call RenderForm.OnUserResized event when cachedSize is empty

RobyDX/SharpDX,jwollen/SharpDX,andrewst/SharpDX,VirusFree/SharpDX,wyrover/SharpDX,shoelzer/SharpDX,jwollen/SharpDX,PavelBrokhman/SharpDX,weltkante/SharpDX,andrewst/SharpDX,shoelzer/SharpDX,RobyDX/SharpDX,weltkante/SharpDX,TigerKO/SharpDX,weltkante/SharpDX,waltdestler/SharpDX,davidlee80/SharpDX-1,wyrover/SharpDX,TechPriest/SharpDX,VirusFree/SharpDX,manu-silicon/SharpDX,VirusFree/SharpDX,Ixonos-USA/SharpDX,dazerdude/SharpDX,fmarrabal/SharpDX,manu-silicon/SharpDX,manu-silicon/SharpDX,mrvux/SharpDX,sharpdx/SharpDX,mrvux/SharpDX,mrvux/SharpDX,davidlee80/SharpDX-1,TigerKO/SharpDX,TigerKO/SharpDX,RobyDX/SharpDX,waltdestler/SharpDX,Ixonos-USA/SharpDX,Ixonos-USA/SharpDX,TechPriest/SharpDX,shoelzer/SharpDX,shoelzer/SharpDX,PavelBrokhman/SharpDX,TechPriest/SharpDX,sharpdx/SharpDX,davidlee80/SharpDX-1,PavelBrokhman/SharpDX,waltdestler/SharpDX,PavelBrokhman/SharpDX,wyrover/SharpDX,VirusFree/SharpDX,fmarrabal/SharpDX,RobyDX/SharpDX,fmarrabal/SharpDX,TechPriest/SharpDX,dazerdude/SharpDX,dazerdude/SharpDX,waltdestler/SharpDX,weltkante/SharpDX,sharpdx/SharpDX,davidlee80/SharpDX-1,Ixonos-USA/SharpDX,TigerKO/SharpDX,dazerdude/SharpDX,jwollen/SharpDX,jwollen/SharpDX,wyrover/SharpDX,shoelzer/SharpDX,fmarrabal/SharpDX,andrewst/SharpDX,manu-silicon/SharpDX