include <stdbool.h> after <pbm.h> to avoid compile error on Red Hat 7.3.

     1.1 diff -r 9d43e0dd82a3 -r fe3ef27156c4 tumble_pbm.c
     1.2 --- a/tumble_pbm.c	Tue Dec 09 17:48:33 2003 +0000
     1.3 +++ b/tumble_pbm.c	Tue Dec 09 17:55:25 2003 +0000
     1.4 @@ -21,7 +21,6 @@
     1.5   */
     1.6  
     1.7  
     1.8 -#include <stdbool.h>
     1.9  #include <stdint.h>
    1.10  #include <stdio.h>
    1.11  #include <stdlib.h>
    1.12 @@ -36,6 +35,8 @@
    1.13   */
    1.14  #define PBM_REVERSE_BITS
    1.15  
    1.16 +#include <stdbool.h>
    1.17 +
    1.18  
    1.19  #include "semantics.h"
    1.20  #include "tumble.h"