Index: l10n_client.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/l10n_client/Attic/l10n_client.module,v
retrieving revision 1.22.4.5
diff -u -p -r1.22.4.5 l10n_client.module
--- l10n_client.module	4 Aug 2010 10:39:09 -0000	1.22.4.5
+++ l10n_client.module	4 Aug 2010 10:45:49 -0000
@@ -486,17 +486,19 @@ function l10n_client_import_package_form
     $langcodes = array_keys(array_filter($form_state['values']['langcodes']));
     $textgroups = array_keys(array_filter($form_state['values']['textgroups']));
 
-    $query = db_select('locales_source')->fields('locales_source', array('lid'));
-    $query->condition('textgroup', $textgroups);
-    $lids = $query->execute()->fetchCol('lid');
-
-    db_delete('locales_target')
-      ->condition('language', $langcodes)
-      ->condition('lid', $lids)
-      ->execute();
+    if (!empty($textgroups)) {
+      $query = db_select('locales_source')->fields('locales_source', array('lid'));
+      $query->condition('textgroup', $textgroups);
+      $lids = $query->execute()->fetchCol('lid');
+
+      db_delete('locales_target')
+        ->condition('language', $langcodes)
+        ->condition('lid', $lids)
+        ->execute();
 
-    // Also remove all source strings without translations.
-    db_query("DELETE FROM {locales_source} WHERE lid NOT IN (SELECT lid FROM {locales_target})");
+      // Also remove all source strings without translations.
+      db_query("DELETE FROM {locales_source} WHERE lid NOT IN (SELECT lid FROM {locales_target})");
+    }
   }
 
   // Set up and start batch for new imports.