fixed building bug

src/app/components/main-navigation/main-navigation.component.html

@@ -57,7 +57,7 @@
       </nav>
       <div id="menu-button-box">
         <button mat-icon-button [matMenuTriggerFor]="requestMenu" [disabled]="!loggedIn" id="menu-button">
-          <mat-icon [matBadge]="user.receivedRequests.length" [matBadgeHidden]="!user.receivedRequests.length > 0" matBadgeColor="accent">notifications</mat-icon>
+          <mat-icon [matBadge]="user.receivedRequests.length" [matBadgeHidden]="!(user.receivedRequests.length > 0)" matBadgeColor="accent">notifications</mat-icon>
         </button>
         <button mat-icon-button [matMenuTriggerFor]="menu" id="menu-button">
           <mat-icon>more_vert</mat-icon>