Index: wp-includes/pomo/streams.php
===================================================================
--- wp-includes/pomo/streams.php	(revision 17159)
+++ wp-includes/pomo/streams.php	(working copy)
@@ -110,7 +110,10 @@
 	}
 
 	function read($bytes) {
-		return fread($this->_f, $bytes);
+		if ( !empty($bytes) )
+			return fread($this->_f, $bytes);
+		else
+			return false;
 	}
 
 	function seekto($pos) {