component: Protect about the infamous "headYaw = 12" typo.
component: Protect about the infamous "headYaw = 12" typo.

...excepts the protection does not work on this specific example,
which triggers copy on write and creates lobby.headYaw.

	* share/urbi/component.u (addComponent, addDevice, makeCompactName): Make it const.

aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi