qt: Register CAmount metatype

This allows sending the type over queued connections.
Also normalize signal/slot names.

src/qt/bitcoin.cpp

@@ -73,6 +73,7 @@ Q_IMPORT_PLUGIN(QCocoaIntegrationPlugin);
 
 // Declare meta types used for QMetaObject::invokeMethod
 Q_DECLARE_METATYPE(bool*)
+Q_DECLARE_METATYPE(CAmount)
 
 static void InitMessage(const std::string &message)
 {
@@ -509,6 +510,9 @@ int main(int argc, char *argv[])
 
     // Register meta types used for QMetaObject::invokeMethod
     qRegisterMetaType< bool* >();
+    //   Need to pass name here as CAmount is a typedef (see http://qt-project.org/doc/qt-5/qmetatype.html#qRegisterMetaType)
+    //   IMPORTANT if it is no longer a typedef use the normal variant above
+    qRegisterMetaType< CAmount >("CAmount");
 
     /// 3. Application identification
     // must be set before OptionsModel is initialized or translations are loaded,