VersionCheck: Make variable created by the macro static.
VersionCheck: Make variable created by the macro static.

...the bug of doom that prevented two UStarts on the same line
in two different .o files was back.

	* sdk-remote/include/urbi/version-check.hh
	(URBI_CHECK_SDK_VERSION_BARE): Make the variable static.

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