Fix to mirror modifier loading (buffer bounds were exceeded in some cases).

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7945 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/blender/com/jme3/scene/plugins/blender/helpers/v249/ModifierHelper.java

@@ -699,7 +699,7 @@ public class ModifierHelper extends AbstractBlenderHelper {
 
                             //modifying clone indexes
                             int vertexIndex = (i - mirrorIndex) / 3;
-                            if (vertexIndex % 3 == 0) {
+                            if (vertexIndex % 3 == 0 && vertexIndex<cloneIndexes.limit()) {
                                 int index = cloneIndexes.get(vertexIndex + 2);
                                 cloneIndexes.put(vertexIndex + 2, cloneIndexes.get(vertexIndex + 1));
                                 cloneIndexes.put(vertexIndex + 1, index);