tree 6395410ec24fa374507939c3c52d008ac8c504c4
parent d1e954d246fee0cb9dd67bf9fe224debd9aa84dd
author Alex Stewart <alexs.mac@gmail.com> 1480616411 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1480616411 +0000

Clear XXX_FOUND in Find<XXX>.cmake prior to searching.

- This protects against a client project which invokes
  find_package(Ceres) after having called find_package(Foo) with their
  own version of FindFoo.cmake which conflicts with Ceres’ exported
  version and defines FOO_FOUND, but not the other variables Ceres’
  FindFoo.cmake is expecting which can break the detection logic.

Change-Id: I9fe7bfa8a34bb58b09ffe34446da973912cf5587