Fixes issue #1929, with insert method in IntList and FloatList.

core/src/processing/data/FloatList.java

@@ -301,7 +301,7 @@ public class FloatList implements Iterable<Float> {
     if (index < 0) {
       throw new IllegalArgumentException("insert() index cannot be negative: it was " + index);
     }
-    if (index >= values.length) {
+    if (index >= data.length) {
       throw new IllegalArgumentException("insert() index " + index + " is past the end of this list");
     }
 
@@ -720,4 +720,4 @@ public class FloatList implements Iterable<Float> {
     sb.append(" ]");
     return sb.toString();
   }
-}
+}

core/src/processing/data/IntList.java

@@ -255,7 +255,7 @@ public class IntList implements Iterable<Integer> {
     if (index < 0) {
       throw new IllegalArgumentException("insert() index cannot be negative: it was " + index);
     }
-    if (index >= values.length) {
+    if (index >= data.length) {
       throw new IllegalArgumentException("insert() index " + index + " is past the end of this list");
     }
 
@@ -725,4 +725,4 @@ public class IntList implements Iterable<Integer> {
     sb.append(" ]");
     return sb.toString();
   }
-}
+}