* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
-#ifndef HB_H_IN
+#if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
#error "Include <hb.h> instead."
#endif
*
* Glyph draw callbacks.
*
- * _move_to, _line_to and _cubic_to calls are nessecary to be defined but we
+ * _move_to, _line_to and _cubic_to calls are necessary to be defined but we
* translate _quadratic_to calls to _cubic_to if the callback isn't defined.
*
* Since: EXPERIMENTAL