Fixed an falsey if statement

src/extensions/filter-control/utils.js

@@ -307,7 +307,7 @@ export function initFilterSelectControls (that) {
         const formatter = that.options.editable && column.editable ? column._formatter : that.header.formatters[j]
         let formattedValue = Utils.calculateObjectValue(that.header, formatter, [fieldValue, data[i], i], fieldValue)
 
-        if (!fieldValue) {
+        if (fieldValue === undefined || fieldValue === null) {
           fieldValue = formattedValue
           column._forceFormatter = true
         }