Fix problems with missing safety checks in Render::fillBuffer and pdfcomic

custom_widgets/yacreader_sidebar.h

@@ -0,0 +1,47 @@
+#ifndef YACREADER_SIDEBAR_H
+#define YACREADER_SIDEBAR_H
+
+#include <QtWidgets>
+
+class YACReaderFoldersView;
+class YACReaderLibraryListWidget;
+class YACReaderSearchLineEdit;
+class YACReaderTitledToolBar;
+class YACReaderTitledToolBar;
+class YACReaderReadingListsView;
+
+class YACReaderSideBarSeparator : public QWidget
+{
+public:
+    explicit YACReaderSideBarSeparator(QWidget * parent = 0);
+protected:
+    void paintEvent(QPaintEvent *event);
+};
+
+class YACReaderSideBar : public QWidget
+{
+	Q_OBJECT
+public:
+	explicit YACReaderSideBar(QWidget *parent = 0);
+	QSize sizeHint() const;
+
+    YACReaderFoldersView * foldersView;
+    YACReaderReadingListsView * readingListsView;
+	YACReaderLibraryListWidget * selectedLibrary;
+	YACReaderTitledToolBar * librariesTitle;
+	YACReaderTitledToolBar * foldersTitle;
+    YACReaderTitledToolBar * readingListsTitle;
+	
+signals:
+	
+public slots:
+
+protected:
+	void paintEvent(QPaintEvent *);
+    void closeEvent ( QCloseEvent * event );
+    QSettings * settings;
+    QSplitter * splitter;
+	
+};
+
+#endif // YACREADER_SIDEBAR_H