Bug report: Disassemble_x86 - Wrong instruction position displayed

**Describe the bug**
Wrong instruction position displayed for the Disassemble_x86 tool.

**To Reproduce**
1. Add a simple instruction as 'Input' e.g. FF E0 - JMP RAX. Correct 0000000000000000 position is displayed in 'Output'
2. Decrease 'Offset (IP)' to -1. 00000000FFFFFFFF position is displayed in 'Output'
3. Increase 'Offset (IP)' back to 0.
4. Incorrect position 00000000FFFF0000 is displayed in 'Output'

**Expected behaviour**
0000000000000000 position should be displayed in 'Output' when there is no offset

**Screenshots**