Fix image_overlay bug
Fix image_overlay bug

andrewgiessel/folium,BibMartin/folium,python-visualization/folium,shankari/folium,talespaiva/folium,talespaiva/folium,ocefpaf/folium,python-visualization/folium,andrewgiessel/folium,talespaiva/folium,QuLogic/folium,talespaiva/folium,shankari/folium,BibMartin/folium,shankari/folium,BibMartin/folium,ocefpaf/folium,QuLogic/folium,QuLogic/folium,andrewgiessel/folium