audit missing null check

src/app/dars/audit/audit.component.html

@@ -80,8 +80,8 @@
         </ng-container>
       </table>
 
-      <table mat-table [dataSource]="audit.topSection.advancedStandingCreditsSection.advanceStandingCredits">
-        <caption>{{audit.topSection.advancedStandingCreditsSection.sectionLabel}}</caption>
+      <table mat-table [dataSource]="audit.topSection.advancedStandingCreditsSection?.advanceStandingCredits">
+        <caption>{{audit.topSection.advancedStandingCreditsSection?.sectionLabel}}</caption>
         <tr mat-header-row *matHeaderRowDef="advancedStandingCredits"></tr>
         <tr mat-row *matRowDef="let row; columns: advancedStandingCredits;"></tr>
         <tr mat-footer-row *matFooterRowDef="advancedStandingCredits"></tr>
@@ -101,13 +101,13 @@
         <ng-container matColumnDef="degreeCreditsValue">
           <th mat-header-cell *matHeaderCellDef class="text-align-right">Deg</th>
           <td mat-cell *matCellDef="let course" class="text-align-right">{{course.degreeCreditsValue}}</td>
-          <td mat-footer-cell *matFooterCellDef class="bold text-align-right">{{audit.topSection.advancedStandingCreditsSection.totals.degreeCreditsValue}}</td>
+          <td mat-footer-cell *matFooterCellDef class="bold text-align-right">{{audit.topSection.advancedStandingCreditsSection?.totals.degreeCreditsValue}}</td>
         </ng-container>
 
         <ng-container matColumnDef="courseCreditsValue">
           <th mat-header-cell *matHeaderCellDef class="text-align-right">Crse</th>
           <td mat-cell *matCellDef="let course" class="text-align-right">{{course.courseCreditsValue}}</td>
-          <td mat-footer-cell *matFooterCellDef class="bold text-align-right">{{audit.topSection.advancedStandingCreditsSection.totals.courseCreditsValue}}</td>
+          <td mat-footer-cell *matFooterCellDef class="bold text-align-right">{{audit.topSection.advancedStandingCreditsSection?.totals.courseCreditsValue}}</td>
         </ng-container>
       </table>
   </section>