Smbios: add struct layout check

src/detection/host/host_windows.c

@@ -18,13 +18,16 @@ typedef struct FFSmbiosSystemInfo
         uint8_t ClockSeqHiAndReserved;
         uint8_t ClockSeqLow;
         uint8_t Node[6];
-    } UUID; // varies
+    } __attribute__((__packed__)) UUID; // varies
     uint8_t WakeUpType; // enum
 
     // 2.4+
     uint8_t SKUNumber; // string
     uint8_t Family; // string
-} FFSmbiosSystemInfo;
+} __attribute__((__packed__)) FFSmbiosSystemInfo;
+
+static_assert(offsetof(FFSmbiosSystemInfo, Family) == 0x1A,
+    "FFSmbiosSystemInfo: Wrong struct alignment");
 
 const char* ffDetectHost(FFHostResult* host)
 {