message: Fix check to use a clean build
diff: @@ -357,9 +357,9 @@ if(COMMAND dashboard_hook_init)
  endif()
  if(dashboard_fresh)
  - if(EXISTS CTEST_BINARY_DIRECTORY)
  + if(EXISTS "${CTEST_BINARY_DIRECTORY}")
  message("Clearing build tree...")
  - ctest_empty_binary_directory(${CTEST_BINARY_DIRECTORY})
  + ctest_empty_binary_directory("${CTEST_BINARY_DIRECTORY}")
  else()
  file(MAKE_DIRECTORY "${CTEST_BINARY_DIRECTORY}")
  endif()
  