Add a check in background plugin to prevent undefined background styles injected #58
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If background plugin is used at the same time as DOM elements that is set to lazy load, the background plugin incorrectly also injects a background-image style to each element. This causes a lot of undefined image loading
style="background-image: url(http://magento.zabadaclean.biz/undefined);"
This fix ads a check to determine that an element has a valid defined bgAttr set.