Fix bug when trying to stop streaming and a brainflow error is thrown

Author: retiutut

OpenBCI_GUI/BoardBrainflow.pde

@@ -102,9 +102,13 @@ abstract class BoardBrainFlow extends Board {
             time_last_datapoint = -1.0;
         }
         catch (BrainFlowError e) {
-            println("ERROR: Exception when stoppping stream");
+            outputError("ERROR: Exception when stopping stream. Please restart the Board and Session.");
             e.printStackTrace();
-            streaming = true;
+            //If no data was received in X seconds, there is a serious problem with communications. Go ahead and stop trying to collect data.
+            //Prevents feedback loop of errors.
+            if (data_popup_displayed) {
+                streaming = false;
+            }
         }
 
         if (eegDataSource != DATASOURCE_PLAYBACKFILE && eegDataSource != DATASOURCE_STREAMING) {