Ensure courses with undergrad crosslistings are also returned

improve readability

src/UNL/Catalog/CourseSearch/DBSearcher.php

@@ -4,7 +4,16 @@ class UNL_Catalog_CourseSearch_DBSearcher extends UNL_UndergraduateBulletin_Cour
 
     function getQueryResult($query, $offset = 0, $limit = -1)
     {
-        $query =  'SELECT DISTINCT courses.id, courses.xml FROM courses INNER JOIN crosslistings c1 ON courses.id=c1.course_id INNER JOIN crosslistings ON courses.id=crosslistings.course_id WHERE c1.courseNumber >= "500" AND c1.courseNumber != crosslistings.courseNumber AND (' . $query . ');';
+        $query =  'SELECT DISTINCT courses.id, courses.xml 
+
+                    FROM courses
+
+                    INNER JOIN crosslistings ON courses.id=crosslistings.course_id
+                    INNER JOIN crosslistings c1 ON courses.id=c1.course_id
+
+                    WHERE 
+                        c1.courseNumber >= "500" AND
+                        (' . $query . ');';
         return new UNL_UndergraduateBulletin_CourseSearch_DBSearchResults($query, $offset, $limit);
     }
 }
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