*Catch an exception that could appear if MobileScannerController is disposed during start(). [#1036](https://github.com/juliansteenbakker/mobile_scanner/pull/1036)(thanks @EArminjon !)
*Fixed a crash when the controller is disposed while it is still starting. [#1036](https://github.com/juliansteenbakker/mobile_scanner/pull/1036)(thanks @EArminjon !)