[Cdash] Missing command arguments in build failures

[Nils Gladitz]

Since the mailing list currently seems to have more traction than the 
issue tracker I thought I'd mention it here as well:

http://www.cmake.org/Bug/view.php?id=15484

Apparently sometimes the "buildfailure2argument" table references 
arguments that are missing from the "buildfailureargument" table.

This leads to seemingly random missing arguments in the command lines 
shown on viewBuildError.php which obviously makes trusting/reproducing 
them difficult.

Nils