while (!checkEndOfFile(file))
{
+ // level file might contain invalid change page number
+ if (xx_current_change_page >= ei->num_change_pages)
+ break;
+
struct ElementChangeInfo *change = &ei->change_page[xx_current_change_page];
xx_change = *change; // copy change data into temporary buffer
struct ElementInfo *ei = &element_info[element];
struct ElementGroupInfo *group = ei->group;
+ if (group == NULL)
+ return -1;
+
xx_ei = *ei; // copy element data into temporary buffer
xx_group = *group; // copy group data into temporary buffer