[PATCH v12 1/6] cmdline: include stddef.h for MSVC compatibility

[Lukas Sismis <sismis@dyna-nic.com>]

Include <stddef.h> at the top of cmdline_parse.h before the
fallback offsetof macro definition. This improves MSVC build
compatibility by ensuring the standard offsetof is available
before the fallback definition, avoiding macro redefinition
warnings when building with /WX (warnings as errors).

The standard header provides offsetof on all platforms, and
including it first ensures the fallback is only used when truly
needed.

Signed-off-by: Lukas Sismis <sismis@dyna-nic.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/cmdline/cmdline_parse.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/cmdline/cmdline_parse.h b/lib/cmdline/cmdline_parse.h
index d9a7d86256..c4131e4af5 100644
--- a/lib/cmdline/cmdline_parse.h
+++ b/lib/cmdline/cmdline_parse.h
@@ -7,6 +7,8 @@
 #ifndef _CMDLINE_PARSE_H_
 #define _CMDLINE_PARSE_H_
 
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
-- 
2.43.7