dcmtk: fixed type error (#17758)

* dcmtk: fixed type error

* Update var/spack/repos/builtin/packages/dcmtk/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

var/spack/repos/builtin/packages/dcmtk/package.py

@@ -37,6 +37,16 @@ class Dcmtk(CMakePackage):
     variant('cxx11', default=False, description="Enable c++11 features")
     variant('stl', default=True, description="Use native STL implementation")
 
+    def patch(self):
+        # Backport 3.6.4
+        if self.spec.satisfies('@:3.6.3 %fj'):
+            filter_file(
+                'OFintegral_constant<size_t,-1>',
+                'OFintegral_constant<size_t,~OFstatic_cast(size_t,0)>',
+                'ofstd/include/dcmtk/ofstd/variadic/helpers.h',
+                string=True
+            )
+
     def cmake_args(self):
         args = ["-DDCMTK_WITH_OPENSSL={0}".format(
             'ON' if '+ssl' in self.spec else 'OFF')]