Highlight possible DB issue - closes #888

This is an edge case. Not clear how the reported ended up with this DB issue but, until we know, this fix will highlight the issue and handle it gracefully.

Author: barryo

resources/views/user/index.foil.php

@@ -80,9 +80,13 @@
                                           Multiple (<?= $u['nbC2U'] ?>)
                                         </a>
                                     <?php else: ?>
-                                        <a href="<?=  route( "customer@overview" , [ 'cust' => $u[ 'custid' ] ] ) ?>">
-                                            <?= $t->ee( $u['customer'] ) ?>
-                                        </a>
+                                        <?php if( !$u['customer'] || !$u[ 'custid' ] ): ?>
+                                            <span class="badge badge-warning">DB Issue?</span> User not affiliated to a customer.
+                                        <?php else: ?>
+                                            <a href="<?=  route( "customer@overview" , [ 'cust' => $u[ 'custid' ] ] ) ?>">
+                                                <?= $t->ee( $u['customer'] ) ?>
+                                            </a>
+                                        <?php endif; ?>
                                     <?php endif; ?>
                                 </td>
                             <?php endif; ?>