Fix #79172: STRUCT_OFFSET() relies on undefined behavior

Since this pattern is understood by compilers, not a real issue, but
certainly cleaner this way.

diff --git a/ext/mysqlnd/mysqlnd_portability.h b/ext/mysqlnd/mysqlnd_portability.h
index 873f49b0cd19657b70f6d3a56f1545b55ac6a232..20649061933b6c35e7318f20aae1f2a78c463316 100644 (file)
--- a/ext/mysqlnd/mysqlnd_portability.h
+++ b/ext/mysqlnd/mysqlnd_portability.h
@@ -15,7 +15,7 @@ This file is public domain and comes with NO WARRANTY of any kind */
 
 
 /* Comes from global.h as OFFSET, renamed to STRUCT_OFFSET */
-#define STRUCT_OFFSET(t, f)   ((size_t)(char *)&((t *)0)->f)
+#define STRUCT_OFFSET(t, f)   XtOffsetOf(t, f)
 
 #ifndef __attribute
 #if !defined(__GNUC__)