Fix calculation of mask for constant values

This fixes an error when a constant is being loaded into a flag.
The constants associated with a flag value have their size set to zero.
That causes the mask for the constant value to be all zeros. Due to that,
getting the value of a zero sized constant will always return 0 even if
it should be 1.

This commit special cases the size of zero to create a mask of 1 which
will correctly mask off the lowest byte and return that as the constant.

0 files changed, 0 insertions, 0 deletions