fixed issue with not empty case role filter

CHANGELOG.md

 # Version 1.16 (not yet released)
 
 * Fixed blank worldregion in CVS output #52
+* Fixed issue with not empty case role filter.
 
 # Version 1.15.1
 

Civi/DataProcessor/FilterHandler/AbstractFilterHandler.php

@@ -333,24 +333,20 @@ abstract class AbstractFilterHandler {
           break;
 
         case 'null':
-          if (empty($submittedValues['value'])) {
-            $filterParams = [
-              'op' => 'IS NULL',
-              'value' => '',
-            ];
-            $this->setFilter($filterParams);
-            $isFilterSet = TRUE;
-          }
+          $filterParams = [
+            'op' => 'IS NULL',
+            'value' => '',
+          ];
+          $this->setFilter($filterParams);
+          $isFilterSet = TRUE;
           break;
         case 'not null':
-          if (empty($submittedValues['value'])) {
-            $filterParams = [
-              'op' => 'IS NOT NULL',
-              'value' => '',
-            ];
-            $this->setFilter($filterParams);
-            $isFilterSet = TRUE;
-          }
+          $filterParams = [
+            'op' => 'IS NOT NULL',
+            'value' => '',
+          ];
+          $this->setFilter($filterParams);
+          $isFilterSet = TRUE;
           break;
         case 'bw':
           if (isset($submittedValues['min']) && $submittedValues['min'] && isset($submittedValues['max']) && $submittedValues['max']) {

templates/CRM/Dataprocessor/Form/Filter/GenericFilter.tpl

@@ -29,7 +29,7 @@
   CRM.$(function($) {
     cj("#{/literal}{$fieldOp}{literal}").change(function() {
       var val = $(this).val();
-      if (val == 'current_user' || val == 'null' || val == 'is null') {
+      if (val == 'current_user' || val == 'null' || val == 'not null') {
         cj("#{/literal}{$filterVal}{literal}").addClass('hiddenElement');
       } else {
         cj("#{/literal}{$filterVal}{literal}").removeClass('hiddenElement');