[CMake] Subversion_WC_INFO macro should not do SEND_ERROR

[Marcel Loose]

Hi all,

IMHO the macro Subversion_WC_INFO in FindSubversion.cmake should not do
a SEND_ERROR, when the 'svn info' command fails. This makes the macro
useless if you want to be able to use it both on SVN working copies and
SVN exported trees. Either make this behaviour configurable, or change
it to STATUS (or WARNING, but that's not supported for CMake < 2.8)

Best regards,
Marcel Loose.