#2949: use c99 bool instead of typedefing our own

Reporter: Roland Haas Status: new Milestone: Version: Type: bug Priority: minor Component:

C23 makes `bool` a reserved keyword and provides the type by default making some thorns (and the flesh) fail to compiled.

These three pull requests add the required `#include <stdbool.h>` to the respective files. Since this exists in c99, which Cactus requires, this is fine.

-- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2949/use-c99-bool-inste...