Input grab key should be Ctrl-Alt-g, not just Ctrl-Alt.
Fixes: f8d2c9369b ("sdl: use ctrl-alt-g as grab hotkey")
Signed-off-by: Tianlan Zhou <bobby825@126.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>