Incorrect GtkAction signal prototypes

[Jeff Franks <jcf tpg com au>]

Hi,

I think the "activate", "connect_proxy" and "disconnect_proxy" signal 
prototypes are incorrectly declared in gtkaction.h. None of the signals 
have a "user_data" parameter, but in the GtkAction.html doc file the 
signals are declared as having a "user_data" argument. Language bindings 
need this parameter.

Jeff Franks.