Update Mono.Debugging.Soft/PortablePdbData.cs
Update Mono.Debugging.Soft/PortablePdbData.cs

Co-Authored-By: Marius Ungureanu <d1bb03c8aa05c2aa84e0b50e90f99f37653daca0@yahoo.com>
Unity-Technologies/debugger-libs,Unity-Technologies/debugger-libs,mono/debugger-libs,mono/debugger-libs