Add try/catch in the SnipeHelper calls

Make sure phab won't raise errors if the SnipeHelper methods
or API requests fail.

src/applications/maniphest/editor/ManiphestTransactionEditor.php

@@ -397,7 +397,11 @@ final class ManiphestTransactionEditor
           // CCU: create Item in the inventory system if it's a Purchase request and
           // its status was changed to "to release"
           if (!$this->getIsNewObject()) {
-            $asset_id = $snipe_api->createAssetItem($new_status, $object, $xactions);
+            try {
+              $asset_id = $snipe_api->createAssetItem($new_status, $object, $xactions);
+            } catch (Exception $e) {
+              $asset_id = null;
+            }
           }
           break;
       }
@@ -601,7 +605,11 @@ final class ManiphestTransactionEditor
     // CCU: if it's a Shipping Request, check if it has an asset item
     // in Snipe-IT and automatically fill in some fields.
     if ($subtype == 'shipping') {
-      $transactions = $snipe_api->fetchAssetItem($object, $xactions);
+      try {
+        $transactions = $snipe_api->fetchAssetItem($object, $xactions);
+      } catch (Exception $e) {
+        $transactions = [];
+      }
       foreach ($transactions as $transaction) {
         $results[] = $transaction;
       }