BUG: Check that region for thread is not empty

Fix the following failure on ITKExamples:

  http://open.cdash.org/testDetails.php?test=199789893&build=2975061

Change-Id: I8b67c0d4e38a688154d0c9a316b491a7a2949f79
BUG: Remove ENABLED_SHARED option for IOSpatialObjects module

revert commit e55e67b7757ed07757d0fae5e6b657953e382cbb for
IOSpactialObjects directory. The SpatialObjects module depends on module
IOXML and ITKSpatialObjecs this is creating symbol confusion on some
platform causing valgrind defects and test failures.

Change-Id: I7cc3b430985c68ffcf774e88b35739886541a187
Merge topic 'FixObserveExample'

82f1d19 BUG: Check that region for thread is not empty
Merge topic 'RemoveENALBESHAREDIOSpatialObjects'

2382b66 BUG: Remove ENABLED_SHARED option for IOSpatialObjects module