fix sharing bug introduced with oracle support

lib/public/share.php

@@ -516,10 +516,6 @@ class Share {
 				// If the limit is not 1, the filtering can be done later
 				$where .= ' ORDER BY `*PREFIX*share`.`id` DESC';
 			}
-			// The limit must be at least 3, because filtering needs to be done
-			if ($limit < 3) {
-				$limit = 3;
-			}
 		}
 		// TODO Optimize selects
 		if ($format == self::FORMAT_STATUSES) {
@@ -548,7 +544,8 @@ class Share {
 			}
 		}
 		$root = strlen($root);
-		$query = \OC_DB::prepare('SELECT '.$select.' FROM `*PREFIX*share` '.$where, $limit);
+                // The limit must be at least 3, because filtering needs to be done
+		$query = \OC_DB::prepare('SELECT '.$select.' FROM `*PREFIX*share` '.$where, ($limit < 3 ? 3 : $limit));
 		$result = $query->execute($queryArgs);
 		$items = array();
 		$targets = array();