[SPARK-4409] Hopefully fixed Java Test

Author: brkyvz

mllib/src/test/java/org/apache/spark/mllib/linalg/JavaMatricesSuite.java

@@ -82,8 +82,8 @@ public void diagonalMatrixConstruction() {
         assertArrayEquals(s.values(), ss.values(), 0.0);
         assert(s.values().length == 2);
         assert(ss.values().length == 2);
-        assert(s.colPtrs().length == 2);
-        assert(ss.colPtrs().length == 2);
+        assert(s.colPtrs().length == 4);
+        assert(ss.colPtrs().length == 4);
     }
 
     @Test