Fix a crash and quitting accidentally

src/dialogs/NewFileDialog.cpp

@@ -298,20 +298,20 @@ void NewFileDialog::loadFile(const QString &filename)
 
         settings.setValue("recentFileList", files);
 
-        close();
-
         // Close dialog and open MainWindow/OptionsDialog
         MainWindow *main = new MainWindow();
         main->openNewFile(filename);
         //OptionsDialog *o = new OptionsDialog(fname);
         //o->exec();
+
+        close();
     }
 }
 
 void NewFileDialog::loadProject(const QString &project)
 {
-    close();
-
     MainWindow *main = new MainWindow();
     main->openProject(project);
+    
+    close();
 }

src/widgets/CodeGraphic.cpp

@@ -79,7 +79,12 @@ void GraphicsBar::fillData()
     int to = mainMap["to"].toInt();
     int block = mainMap["blocksize"].toInt();
     int size = (to - from);
-    int num = size / block;
+    int num = 1;
+    if (block != 0)
+    {
+        num = size / block;
+    }
+
     if (num < 1)
     {
         num = 1;