Use smb_fgetlength() instead of filelenth(fileno()).

src/sbbs3/scfgsave.c

@@ -1151,7 +1151,7 @@ int DLLCALL smb_open_sub(scfg_t* cfg, smb_t* smb, unsigned int subnum)
 	}
 	smb->retry_time = cfg->smb_retry_time;
 	if((retval = smb_open(smb)) == SMB_SUCCESS) {
-		if(filelength(fileno(smb->shd_fp)) < sizeof(smbhdr_t) + sizeof(smb->status)) {
+		if(smb_fgetlength(smb->shd_fp) < sizeof(smbhdr_t) + sizeof(smb->status)) {
 			if((retval = smb_create(smb)) != SMB_SUCCESS)
 				smb_close(smb);
 		}