xt_condition: use sizeof_field macro to size variable name

4.16 introduced a macro for getting the size of a struct member, so
let's use it.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>

diff --git a/extensions/xt_condition.c b/extensions/xt_condition.c
index 8227c5d13f1af759995661f6373ce63abc482e78..c2c48670c7889f52b08b681b4592e3dbb0153399 100644 (file)
--- a/extensions/xt_condition.c
+++ b/extensions/xt_condition.c
@@ -55,7 +55,7 @@ struct condition_variable {
        struct proc_dir_entry *status_proc;
        unsigned int refcount;
        bool enabled;
-       char name[sizeof(((struct xt_condition_mtinfo *)NULL)->name)];
+       char name[sizeof_field(struct xt_condition_mtinfo, name)];
 };
 
 /* proc_lock is a user context only semaphore used for write access */