Create pull request for branch dev-fixes

[Machiry]

This fixes various issues on top of the dev branch.
Specifically, the following issues have been fixed:

• Using calloc() will keep the pointer wild #8
• checked-c-convert tool: struct variable containing a checked pointer not initialized #3
• converter tool deletes variable arguments #2

[rchyena]

I will look over this PR, but you have push access to the repository, right? You should just merge stuff when you feel like it's ready.

[rchyena]

Oh, wait. Did you mean raise a pull request on microsoft/checkedc-clang repo?

[Machiry]

Yes. When our main dev gets merged. We can raise PR for this. Should we first merge this into our dev?

[rchyena]

Yes. You should merge dev-fixes into dev. Once Microsoft accepts PR #642, we will merge their master into dev, and we can raise a new PR.

[Machiry]

Raised the pull request.