Fix #691: Crash when stopping debugging
Fix #691: Crash when stopping debugging

Ignore any R errors/warnings that result from responding "Q" to the Browse> prompt on debugger terminations.

MikhailArkhipov/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,MikhailArkhipov/RTVS,AlexanderSher/RTVS,karthiknadig/RTVS,karthiknadig/RTVS,MikhailArkhipov/RTVS,MikhailArkhipov/RTVS,MikhailArkhipov/RTVS,karthiknadig/RTVS,MikhailArkhipov/RTVS,MikhailArkhipov/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,karthiknadig/RTVS,karthiknadig/RTVS,karthiknadig/RTVS,karthiknadig/RTVS