[Debugger] Retrieving return values sometimes doesn't work

[anevilyak]

Sometimes, when stepping over lines containing nested function calls, the corresponding return values aren't reported in the variables list, even though the functions in question all have debug information available. A consistent testcase needs to be found in order to investigate this further.

[anevilyak]

Problem understood, we aren't correctly handling PLT entries that resolve to a function outside of their containing image.

[anevilyak]

Fixed in hrev50159.