Added ocv:cfunction:: check to check_docs.py

doc/check_docs.py

@@ -84,7 +84,8 @@ class RSTParser(object):
             if balance == 0:
                 if not ll.startswith(".. c:function::") and \
                    not ll.startswith(".. cpp:function::") and \
-                   not ll.startswith(".. ocv:function::"):
+                   not ll.startswith(".. ocv:function::") and \
+                   not ll.startswith(".. ocv:cfunction::"):
                     continue
                 fdecl = ll[ll.find("::") + 3:]
             elif balance > 0: