Structure of if statements causes test failures on some machines.

[Peter Diener]

The test for whether multipatch is used breaks on some machines do to speculative execution of all logical sub expressions causes MultiPatch_MapIsCartesian to be called even when it is not activated.

Pull request is here: https://bitbucket.org/einsteintoolkit/einsteinevolve/pull-requests/21

[Peter Diener]

Please review

[Roland Haas]

Please apply.

[Roland Haas]

Applied as git hash 8a31aab "GRHydro_InitData: Split long if statement." of einsteinevolve

[Roland Haas]

Thank you.