Don't leak peername if accept fails

Even if the accept fails, the peername may be populated.

Author: nikic

ext/standard/streamsfuncs.c

@@ -295,6 +295,9 @@ PHP_FUNCTION(stream_socket_accept)
 		}
 		php_stream_to_zval(clistream, return_value);
 	} else {
+		if (peername) {
+			zend_string_release(peername);
+		}
 		php_error_docref(NULL, E_WARNING, "accept failed: %s", errstr ? ZSTR_VAL(errstr) : "Unknown error");
 		RETVAL_FALSE;
 	}