suppressed invalid TARGET_CMSG_FIRSTHDR macro

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3601 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/syscall_defs.h

@@ -164,9 +164,6 @@ struct target_cmsghdr {
 
 #define TARGET_CMSG_DATA(cmsg) ((unsigned char *) ((struct target_cmsghdr *) (cmsg) + 1))
 #define TARGET_CMSG_NXTHDR(mhdr, cmsg) __target_cmsg_nxthdr (mhdr, cmsg)
-#define TARGET_CMSG_FIRSTHDR(mhdr) \
-  ((size_t) tswapl((mhdr)->msg_controllen) >= sizeof (struct target_cmsghdr) \
-   ? (struct target_cmsghdr *) tswapl((mhdr)->msg_control) : (struct target_cmsghdr *) NULL)
 #define TARGET_CMSG_ALIGN(len) (((len) + sizeof (abi_long) - 1) \
                                & (size_t) ~(sizeof (abi_long) - 1))
 #define TARGET_CMSG_SPACE(len) (TARGET_CMSG_ALIGN (len) \