Fix INSPECT

[kio-watanabe]

There was a problem that the sign was changed when an INSPECT statement was executed for a negative number.
The cause was that putSign(1) is executed before getSign() is executed in init() of CobolInspect.java, which causes the sign to be changed in putSign().

putSign in CobolNumericField.java (lines 527-530)

        else {
            value = (byte) (value >= 0x70 ? value - 0x40 : value);
            this.getDataStorage().setByte(p, (byte) (sign < 0 ? value + 0x40 : value));
        }

Therefore, init() was modified so that getSign() is executed before putSign(1).

[yutaro-sakamoto]

@kio-watanabe
The changes in this pull request are reflected in the following commit.
754f95c