creating new lines works now, fixed several segfaults and bugs

final/main.c

@@ -22,11 +22,8 @@ int open_editor() {
     int max_y, max_x;
     getmaxyx(stdscr, max_y, max_x);
 
-    move(0, 0);
-
     Editor editor = editor_from("this is some text to edit\nthis is the second line\nand this is the third lol");
-
-    fprintf(stderr, "%d %d %d %d", editor.lines, editor.screen_line, editor.screen_col, editor.editmode);
+    move(0, 5);
 
     while (true) {
         refresh();
@@ -37,8 +34,8 @@ int open_editor() {
                     editor.editmode = false;
                     break;
                 case KEY_BACKSPACE:
-                    delchar(&editor);
                     move_cursor(&editor, -1, 0);
+                    delchar(&editor);
                     break;
                 case KEY_DC:
                     delchar(&editor);