[glibmm] Gio::SignalSocket docs: Add an empty line after @newin

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 1d7dd9bb51ab1c4b1731e33c5ecbcb8cf9ef7715
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Thu Mar 19 11:04:15 2015 +0100

    Gio::SignalSocket docs: Add an empty line after @newin
    
    * gio/giomm/socketsource.h: Add an empty line after @newin where it's needed
    in order to avoid bad side effects in the documentation. Doxygen assumes that
    @newin is followed by a paragraph that describes what is new.

 gio/giomm/socketsource.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gio/giomm/socketsource.h b/gio/giomm/socketsource.h
index f166d75..a86ed88 100644
--- a/gio/giomm/socketsource.h
+++ b/gio/giomm/socketsource.h
@@ -55,6 +55,7 @@ public:
    * object's MainContext runs.
    *
    * @newin{2,42}
+   *
    * @param slot A slot to call when polling @a socket results in an event that matches @a condition.
    * The event will be passed as a parameter to @a slot.
    * If <tt>io_handler()</tt> returns <tt>false</tt> the handler is disconnected.