Add missing returns.
Merge topic 'INTERFACE_AUTOUIC_OPTIONS' into next

03830fe Add missing returns.
cmTarget: Report origin of COMPATIBLE_INTERFACE properties.
cmTarget: Require a compatible INTERFACE_AUTOUIC_OPTIONS from dependencies.

Revert the origin-tracking infrastructure from commit 98093c45 (QtAutoUic:
Add INTERFACE_AUTOUIC_OPTIONS target property., 2013-11-20). Use the
compatibility-tracking for compatible strings instead.

If two different dependencies require different AUTOUIC_OPTIONS,
cmake will now appropriately issue an error.
Merge topic 'INTERFACE_AUTOUIC_OPTIONS' into next

77f3772 cmTarget: Require a compatible INTERFACE_AUTOUIC_OPTIONS from dependencies.
2e60b5f cmTarget: Report origin of COMPATIBLE_INTERFACE properties.