[Patch, Fortran] Fix some issues found by Coverity's static-code analysis scan

[Tobias Burnus]

Mikael Morin wrote:
> On 15/09/2012 19:36, Tobias Burnus wrote:
>> As a pre-script: Will you look at Paul's revised assignment patch - or
>> should I do it?
> I looked at it twice or so, and couldn't get the double temporary thing.
> I'll get back to it.

Thanks!

>> Thanks for the analysis. Will you create a patch?
> Attached. Tested against "*namelist*" and full regression test in
> progress. OK?

OK. Thanks for the patch.

Tobias