Teko: fix compile error introduced by e728fc01
Created by: ibaned
this variable does need to be defined if the assert() call will be using it, so it needs to be protected by the same condition that controls assert(), which is NDEBUG
@trilinos/teko Trilinos develop failed to compile in the Albany CDash: http://my.cdash.org/viewBuildError.php?buildid=1158196