COMP: Add missing ';' at end of macro

A ';' is required at the end of macros in a future version of ITK

Author: mseng10

include/itkHigherOrderAccurateGradientImageFilter.h

@@ -120,7 +120,7 @@ class HigherOrderAccurateGradientImageFilter
   /** Set/Get the order of accuracy of the derivative operator.  For more
    * information, see HigherOrderAccurateDerivativeOperator. */
   itkSetMacro(OrderOfAccuracy, unsigned int);
-  itkGetConstMacro(OrderOfAccuracy, unsigned int)
+  itkGetConstMacro(OrderOfAccuracy, unsigned int);
 
     protected : HigherOrderAccurateGradientImageFilter();
   ~HigherOrderAccurateGradientImageFilter() override = default;