Boost 1.35 compatibility.
Boost 1.35 compatibility.

	* src/uconnection.cc: Boost thread 1.35 compatibility.
	(treeLock): Rename as...
	(tree_lock): this.
	I guess, given the name, that it is useless to unlock it at the
	end of the function, but I can't find clear documentation about it...

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