Fix SQL fall down bug

src/main.cpp

@@ -91,7 +91,11 @@ int main(int argc, char* argv[])
     int ret = 0;
     KeyboardManager::getInstance();
     UserOperationLog::cleanHistoryLog();
-
+    bool sqlConnected= SQLHelper::Open();
+    if (sqlConnected)
+    {
+        AppGlobalValues::setDBconnected(true);
+    }
     w.showFullScreen();
     DeviceManager::Default()->initDevice();