Fix atspi_component_contains
Fix atspi_component_contains

Per the spec, org.a11y.Atspi.Component.Contains takes a uint32 for the coord
type, not an int16

https://bugzilla.gnome.org/show_bug.cgi?id=710730

GNOME/at-spi2-core,GNOME/at-spi2-core,GNOME/at-spi2-core