COMP: Fix misplaced closing brace

In itkMacro.h there is one template function,
itkDynamicCastInDebugMode
and through some oversight, the closing curly brace
was at the bottom of the file, after the definition
of many preprocessor macros. This moves the closing
brace up to its proper place

Change-Id: Id3f5d70eea54395b6e53e04c723894caa8c4479a
Merge topic 'MisplacedClosingBrace'

94ba8e80 COMP: Fix misplaced closing brace