Some quick formatting changes to stdwndclass_windows.go.
Some quick formatting changes to stdwndclass_windows.go.

cainiaocome/ui,ProtonMail/ui,UIKit0/ui,mirrr/ui,beni55/ui,292388900/ui,robbiev/ui,hajimehoshi/ui,janstk/ui,hajimehoshi/ui,HunterChen/ui,ProtonMail/ui,beni55/ui,janstk/ui,292388900/ui,292388900/ui,HunterChen/ui,robbiev/ui,UIKit0/ui,HunterChen/ui,hajimehoshi/ui,ProtonMail/ui,robbiev/ui,janstk/ui,cainiaocome/ui,mirrr/ui,mirrr/ui,beni55/ui,UIKit0/ui,cainiaocome/ui