Fix for issue #10

Author: Tiago Sousa

js/zoom.js

@@ -23,6 +23,8 @@
 
     if (!target || target.tagName != 'IMG') return
 
+    if (this._$body.hasClass('zoom-overlay-open')) return
+
     if (e.metaKey) return window.open(e.target.src, '_blank')
 
     if (target.width >= (window.innerWidth - Zoom.OFFSET)) return