signal.hpp:

	- Rely on BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX to determine when we
	  can use the function type syntax for Signals


[SVN r19749]

libs/signals

@@ -1 +1 @@
-Subproject commit 2cff49bcc844619107beaf24b9c58d3ff6ad24db
+Subproject commit 967db917e9e2637e219238331649f3559d4e6882