PDFBOX-5660: optimize, as suggested by Valery Bokov; closes #393

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1931159 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/interactive/annotation/PDAnnotationPolygon.java

@@ -139,6 +139,7 @@ public float[][] getPath()
         if (array != null)
         {
             float[][] pathArray = new float[array.size()][];
+            float[] emptyArray = new float[0];
             for (int i = 0; i < array.size(); ++i)
             {
                 COSBase base2 = array.getObject(i);
@@ -148,7 +149,7 @@ public float[][] getPath()
                 }
                 else
                 {
-                    pathArray[i] = new float[0];
+                    pathArray[i] = emptyArray;
                 }
             }
             return pathArray;