Keep right operand within width when right shifting

NUM_IN_PAGE could return a value much larger than 64. According to the
C11 spec 6.5.7 paragraph 3 this is undefined behavior:

> If the value of the right operand is negative or is greater than or
> equal to the width of the promoted left operand, the behavior is
> undefined.

On most platforms, this is usually not a problem as the architecture
will mask off all out-of-range bits.

0 files changed, 0 insertions, 0 deletions