Make syntax for fix more consistent with existing code.

include/JournallingObject.h

@@ -77,7 +77,8 @@ public:
 		return oldJournalling;
 	}
 
-	inline bool isEmpty() {
+	inline bool isEmpty() const
+	{
 		return m_journallingStateStack.isEmpty();
 	}
 

src/gui/widgets/knob.cpp

@@ -592,7 +592,8 @@ void knob::mouseReleaseEvent( QMouseEvent* event )
 		AutomatableModel *thisModel = model();
 		if( thisModel )
 		{
-			if(!thisModel->isEmpty()) {
+			if( !thisModel->isEmpty() )
+			{
 				thisModel->restoreJournallingState();
 			}
 		}