Confused by compiler warning

I am playing with some code that has been automatically generated 
from ASN.1 data specification found in RFC 3280. One of the structures 
generated reads as follows:

typedef struct TBSCertList {
        Version_t       *version        /* OPTIONAL */;
        AlgorithmIdentifier_t    signature;
        Name_t   issuer;
        Time_t   thisUpdate;
        struct Time     *nextUpdate     /* OPTIONAL */;
        struct revokedCertificates {
                A_SEQUENCE_OF(struct Member {
                        CertificateSerialNumber_t        userCertificate;
                        Time_t   revocationDate;
                        struct Extensions       *crlEntryExtensions     /
* OPTIONAL */;

                        /* Context for parsing across buffer boundaries */
                        asn_struct_ctx_t _asn_ctx;
                } ) list;

                /* Context for parsing across buffer boundaries */
                asn_struct_ctx_t _asn_ctx;
        } *revokedCertificates;
        struct Extensions       *crlExtensions  /* OPTIONAL */;

        /* Context for parsing across buffer boundaries */
        asn_struct_ctx_t _asn_ctx;
} TBSCertList_t;

/* Implementation */
extern asn_TYPE_descriptor_t asn_DEF_TBSCertList;
}

where A_SEQUENCE_OF() is defined as

#define A_SEQUENCE_OF(type)                             \
        struct {                                        \
                type **array;                           \
                int count;      /* Meaningful size */   \
                int size;       /* Allocated size */    \
                void (*free)(type *);                   \
        }

	The preprocessor expands this as

typedef struct TBSCertList {
    Version_t *version;
    AlgorithmIdentifier_t signature;
    Name_t issuer;
    Time_t thisUpdate;
    struct Time *nextUpdate;
    struct revokedCertificates {
        struct {
            struct Member {
                CertificateSerialNumber_t userCertificate;
                Time_t revocationDate;
                struct Extensions *crlEntryExtensions;
                asn_struct_ctx_t _asn_ctx;
            } **array;
            int count;
            int size;
            void (*free) (struct Member {
                          CertificateSerialNumber_t userCertificate;
                          Time_t revocationDate;
                          struct Extensions * crlEntryExtensions;
                          asn_struct_ctx_t _asn_ctx;
                          } *);
        } list;

        asn_struct_ctx_t _asn_ctx;
    } *revokedCertificates;
    struct Extensions *crlExtensions;

    asn_struct_ctx_t _asn_ctx;
} TBSCertList_t;

	This compiles all right, but the GCC compiler generates the 
following warning:

TBSCertList.h:47: warning: structure defined inside parms
TBSCertList.h:47: warning: `struct Member' declared inside parameter list
TBSCertList.h:47: warning: its scope is only this definition or 
declaration, which is probably not what you want

	Line 47 is the line that reads

	} ) list;

in the code above, before the preprocessing.

	Now I want to believe that this code is generated the way it is 
generated for some good reason. What I do not understand is what the 
compiler is complaining about. Anybody care to explain? What is it about 
struct Member that the compiler reckons that that's not what we want?