ENH: Clamp STAPLEImageFilter maximum iterations

Clamp `STAPLEImageFilter` maximum iterations to avoid setting a 0 value,
and thus giving rise dynamic memory defects when querying about
non-existing vector indices for the sensitivity and specifity.

Related to commit 5b5d85e.

Modules/Filtering/ImageCompare/include/itkSTAPLEImageFilter.h

@@ -204,7 +204,7 @@ class ITK_TEMPLATE_EXPORT STAPLEImageFilter : public ImageToImageFilter<TInputIm
   /** Set/Get the maximum number of iterations after which the STAPLE algorithm
    *  will be considered to have converged.  In general this SHOULD NOT be set and
    *  the algorithm should be allowed to converge on its own. */
-  itkSetMacro(MaximumIterations, unsigned int);
+  itkSetClampMacro(MaximumIterations, unsigned int, 1, NumericTraits<unsigned int>::max());
   itkGetConstMacro(MaximumIterations, unsigned int);
 
   /** Scales the estimated prior probability that a pixel will be inside the