safe check for cell_max
safe check for cell_max

enemycnt/roo,visagio/roo,fabien-michel/roo,RobertRehberg/roo,pabloh/roo,stevendaniels/roo,thotmx/roo,xchanging-mm4/roo,OpenGov/roo,culturecode/roo,airblade/roo,reshleman/roo,roo-rb/roo,maruware/roo,OpenGov/roo,salsify/roo,OpenGov/roo,malept/roo