Crash when trying 9 patch..

[mwinters-stuff]

This is my first try at the plugin, trying to create a 9patch which is an underline for a text header..
The plugin is crashing with a null pointer error.

My 9patch.json is

[
    {
        "name" : "header_underline",
        "stretch" : {
            "x" : [
                [0, 13],
            ],
            "y" : [
                [0, 63]
            ]
        },
            "content" : {
            "x" : [
                [0,13]
            ],
            "y" : [
                [64, 65]
            ]
          }
    }
]

the header_underline-xhdpi.svg is

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->

<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="14"
   height="66"
   id="svg2"
   version="1.1"
   inkscape:version="0.48.5 r10040"
   sodipodi:docname="header_underline-xhdpi.svg">
  <defs
     id="defs4" />
  <sodipodi:namedview
     id="base"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:pageopacity="0.0"
     inkscape:pageshadow="2"
     inkscape:zoom="12.939394"
     inkscape:cx="-6.0222482"
     inkscape:cy="33"
     inkscape:document-units="px"
     inkscape:current-layer="layer1"
     showgrid="false"
     fit-margin-top="0"
     fit-margin-left="0"
     fit-margin-right="0"
     fit-margin-bottom="0"
     inkscape:snap-page="true"
     inkscape:window-width="1920"
     inkscape:window-height="1031"
     inkscape:window-x="0"
     inkscape:window-y="25"
     inkscape:window-maximized="1" />
  <metadata
     id="metadata7">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     inkscape:label="Layer 1"
     inkscape:groupmode="layer"
     id="layer1"
     transform="translate(-750.14288,-756.50507)">
    <path
       style="stroke:#ff00ff;stroke-width:2;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none"
       d="m 751.33599,821.50507 c 6.7848,0 5.16639,0 11.9512,0"
       id="path3052"
       inkscape:connector-curvature="0"
       sodipodi:nodetypes="cc" />
  </g>
</svg>

What am I doing wrong?

[mwinters-stuff]

Oops, copy-past bit me... I now found that I have left the comma on the first x, after copying the sample json and deleting the extra array items, I missed removing one comma, the JSON parser must add an null into the array.