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execjosh authored
This change adds an additional check for whether the parent element is `null` or `undefined` in `$.color.extract`. This can happen when working with elements that have not yet been added to the DOM under `<body>`. Consider the following example pie chart. var elm = $("<div />") .css({ width: "240px" , height: "320px" }) var data = [ {label: "One", data: "33"} , {label: "Two", data: "33"} , {label: "Three", data: "33"} ] var opts = { legend: { show: true } , series: { pie: { show: true } } } $.plot(elm, data, opts) elm.appendTo($("body")) When flot inserts each legend row, it tries to use the same color as the corresponding graph part, unless it was explicitly specified in the options. However, in this example, `$.color.extract` runs into an unexpected `null` reference because `<body>` is not an ancestor of `elm`. Specifically, a `TypeError: Cannot read property 'nodeName' of undefined` would be thrown.c8c67de8
