Comparing getMCIsSyncing result with 1, instead assuming not valuing …

…0, null.

This was avoiding the syncing of abandoned carts.
Using the magentoStoreId as scopeId (param of getMCIsSyncing) in order to check the abandoned carts in the proper scope.
Closes #1144

app/code/community/Ebizmarts/MailChimp/Model/Api/Batches.php

@@ -362,7 +362,7 @@ public function _sendEcommerceBatch($magentoStoreId)
                 $productAmount = count($productsArray);
                 $batchArray['operations'] = array_merge($batchArray['operations'], $productsArray);
 
-                if ($helper->getMCIsSyncing($mailchimpStoreId)) {
+                if ($helper->getMCIsSyncing($mailchimpStoreId, $magentoStoreId) === 1) {
                     $helper->logBatchStatus('No Carts will be synced until the store is completely synced');
                 } else {
                     //cart operations