fix copy/paste error in common filestorage

lib/filestorage/common.php

@@ -107,7 +107,7 @@ abstract class OC_Filestorage_Common extends OC_Filestorage {
 // 	abstract public function free_space($path);
 // 	abstract public function search($query);
 	public function getLocalFile($path){
-		return $this->getLocalFile();
+		return $this->toTmpFile();
 	}
 	private function toTmpFile($path){//no longer in the storage api, still usefull here
 		$source=$this->fopen($path,'r');