Sped up getuserdat() significantly by eliminating call to lastuser()->flength().

src/sbbs3/userdat.c

@@ -121,7 +121,7 @@ int DLLCALL getuserdat(scfg_t* cfg, user_t *user)
 	char userdat[U_LEN+1],str[U_LEN+1],tmp[64];
 	int i,file;
 
-	if(!user->number || user->number>lastuser(cfg)) {
+	if(!user->number) {
 		memset(user,0,sizeof(user_t));
 		return(-1); 
 	}
@@ -130,6 +130,10 @@ int DLLCALL getuserdat(scfg_t* cfg, user_t *user)
 		memset(user,0,sizeof(user_t));
 		return(errno); 
 	}
+	if(user->number > (filelength(file)/U_LEN)) {
+		close(file);
+		return(-1);	/* no such user record */
+	}
 	lseek(file,(long)((long)(user->number-1)*U_LEN),SEEK_SET);
 	i=0;
 	while(i<LOOP_NODEDAB