Very minor fixes thanks to cppcheck

[Nicola Spanti]

Hi.

I used that:
cppcheck --verbose --quiet --enable=all --force --language=c --std=c89 .
I fixed some errors that were reported by cppcheck. I published that on 
GitLab.com.
https://gitlab.com/RyDroid/bash

The git remote is: https://rydr...@gitlab.com/RyDroid/bash.git
The branch is cppcheck-fix

Feel to merge it upstream. I don't ask credit for this tiny thing. Of 
course, I give the copyright to the FSF.

Regards.