Change Details

1. Fix the crash issue 2. See if it works as expected

1. Fix the crash issue 2. Change the math operation of exclude operation 3. See if it works as expected 4. If all goes all, this can be used to finish basic operations of selection of Krita

1. Fix the crash issue 2. Change the math operation of exclude operation 3. See if it works as expected 4. If all goes all, this can be used to finish basic operations of selection of Krita