cmake HAVE_PTHREAD_COND_T_POINTER examples

JulNadeauCA/libagar CMakeChecks.cmake :2390

check_c_source_compiles("
#include <pthread.h>

int main(int argc, char *argv[])
{
	pthread_cond_t cond = NULL;
	pthread_cond_init(&cond, NULL);
	return (cond != NULL);
}
" HAVE_PTHREAD_COND_T_POINTER)