Pamgen: Remove Build Warnings

[ZUUL42]

Enhancement

@trilinos/pamgen

Issue #3178 is working toward turning Warnings as Errors on for all packages in order in ensure Trilinos maintains a high level of SQA practices across the project.
Currently Pamgen has a warning that need to be handled before we can set Werror for Pamgen and eventually all packages.

A recent test build was performed with -Werror set. The CDash report can be found here.
Once the Pamgen build doesn't emit any warnings that will be promoted to errors, we can set -Werror in the GCC 7.2.0 automated build.

[csiefer2]

Looks like all you have to do is comment out one line. Give it a go!