fix unknown size of void error

diff --git a/ext/sockets/conversions.c b/ext/sockets/conversions.c
index 7467c1f369855826d43a7ea130570addf8243157..1f7d3e87662438c53b2cff3c8a6d7cfda9a08d47 100644 (file)
--- a/ext/sockets/conversions.c
+++ b/ext/sockets/conversions.c
@@ -889,7 +889,7 @@ static void from_zval_write_control(const zval                      *arr,
        if (space_left < req_space) {
                *control_buf = safe_erealloc(*control_buf, 2, req_space, *control_len);
                *control_len += 2 * req_space;
-               memset(*control_buf + *offset, '\0', *control_len - *offset);
+               memset((char *)*control_buf + *offset, '\0', *control_len - *offset);
                memcpy(&alloc->data, control_buf, sizeof *control_buf);
        }