[libsigcplusplus] docs: signal_base/exception_catch: Use signal<R(Args...)> syntax.

[Murray Cumming <murrayc src gnome org>]

commit 81b64007c7f26527417a8145cdcbde7bafb78127
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 16 10:55:18 2016 +0100

    docs: signal_base/exception_catch: Use signal<R(Args...)> syntax.

 sigc++/adaptors/exception_catch.h |    2 +-
 sigc++/signal_base.h              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/sigc++/adaptors/exception_catch.h b/sigc++/adaptors/exception_catch.h
index 4080700..5948a66 100644
--- a/sigc++/adaptors/exception_catch.h
+++ b/sigc++/adaptors/exception_catch.h
@@ -47,7 +47,7 @@ namespace sigc {
  *
  * @par Example:
  * @code
- * sigc::signal<int> some_signal;
+ * sigc::signal<int()> some_signal;
  * some_signal.connect(sigc::exception_catch(&foo, my_catch));
  * @endcode
  *
diff --git a/sigc++/signal_base.h b/sigc++/signal_base.h
index a0e2037..bf79dd5 100644
--- a/sigc++/signal_base.h
+++ b/sigc++/signal_base.h
@@ -265,7 +265,7 @@ private:
  * class MyClass
  * {
  * public:
- *   using MySignalType = sigc::signal<void>;
+ *   using MySignalType = sigc::signal<void()>;
  *   MySignalType get_my_signal() { return m_my_signal; }
  * private:
  *   MySignalType m_my_signal;