allocate space for NUL

diff --git a/ext/dio/dio.c b/ext/dio/dio.c
index 7f25bf17dfc973fb7791ffbfd484087e29422d80..90ba912fc3dbe34be48c6ae0ee1306401089402b 100644 (file)
--- a/ext/dio/dio.c
+++ b/ext/dio/dio.c
@@ -188,7 +188,7 @@ PHP_FUNCTION(dio_read)
                RETURN_NULL();
        }
 
-       data = erealloc(data, res);
+       data = erealloc(data, res + 1);
        data[res] = 0;
 
        RETURN_STRINGL(data, res, 0);