Can't override call type for tail call recursion or functions used in a return statement

[clubby789]

Version and Platform (required):

• Binary Ninja Version: 3.2.3814-dev (if version is stable, please also test the latest development build via the "Update Channel" option)
• OS: Manjaro Linux
• OS Version: 6.0.7-2
• CPU Architecture: x64

Bug Description:
When a function called is part of a HLIL return statement (e.g. return func()) the option to override the call type is not available.

Steps To Reproduce:
Please provide all steps required to reproduce the behavior:

1. Compile this program

void func() { func(); }
int main() {func(); }

2. Open it in Binary Ninja
3. Right click on func() in main (Override call type is available)
4. Right click on return func() in func (It is not available)
   Retyping func to return void makes the option available again, as it is no longer part of a return statement (HLIL_RET with an operand of HLIL_CALL, to HLIL_CALL).

I have also seen this behaviour with __tailcall calls.

Expected Behavior:
The option to overrde call types should be available on all function calls.

[plafosse]

This is fixed as of at least 4.1