Limit the SerialPlotter to max 20 graphs

Author: chromhelm

app/src/processing/app/SerialPlotter.java

@@ -42,6 +42,7 @@ public class SerialPlotter extends AbstractMonitor {
 
   private ArrayList<Graph> graphs;
   private final static int BUFFER_CAPACITY = 500;
+  private final static int MAX_GRAPH_COUNT = 20;
 
   private static class Graph {
     public CircularBuffer buffer;
@@ -282,7 +283,7 @@ public void message(final String s) {
       }
 
       int validParts = 0;
-      for(int i = 0; i < parts.length; ++i) {
+      for(int i = 0; i < parts.length && validParts < MAX_GRAPH_COUNT; ++i) {
         try {          
           double value = Double.valueOf(parts[i]);
           if(validParts >= graphs.size()) {