Fix NPE in JSONUtil.arrayToObjArray when a[i] is null.
Fix NPE in JSONUtil.arrayToObjArray when a[i] is null.

jacksonic/foam,mdittmer/foam,mdittmer/foam,mdittmer/foam,osric-the-knight/foam,foam-framework/foam,osric-the-knight/foam,osric-the-knight/foam,mdittmer/foam,foam-framework/foam,jlhughes/foam,osric-the-knight/foam,foam-framework/foam,jacksonic/foam,jacksonic/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,jacksonic/foam,foam-framework/foam