+#include <stdint.h> /* for uint8_t */
struct World;
struct Map;
-/* If fail != 0, exit with an error message "msg" and clean up. (For "fail",
+/* If "err" != 0, exit with an error message "msg" and clean up. (For "err",
* pass the result of functions that return non-zero as an error status and
* thereby avoid bloating up the code with if-error-conditionals.)
*/
-extern void exit_err(unsigned char fail, struct World * world, char * msg);
+extern void exit_err(uint8_t err, struct World * world, char * msg);