ui/app: (windows) don't cast syscall.Handle to unsafe.Pointer

The cast is not necessary and a syscall.Handle is not a pointer.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

ui/app/os_windows.go

@@ -695,7 +695,7 @@ func setProcessDPIAware() {
 }
 
 func setCapture(hwnd syscall.Handle) syscall.Handle {
-	r, _, _ := _SetCapture.Call(uintptr(unsafe.Pointer(hwnd)))
+	r, _, _ := _SetCapture.Call(uintptr(hwnd))
 	return syscall.Handle(r)
 }