reverted:
--- dcmtk2/config/tests/arith.cc	2018-11-29 13:14:03.000000000 +0100
+++ dcmtk/config/tests/arith.cc	2019-07-26 11:59:10.974799187 +0200
@@ -189,7 +189,7 @@
     //       away or emit compile-time errors.
     volatile T t0 = 1;
     volatile T t1 = 0;
+    //t0 /= t1;
-    t0 /= t1;
 }
 
 // gathers and prints information for integer types
@@ -348,7 +348,7 @@
     volatile T t = guess<T>::snan();
     // Other compilers will trigger only if we use
     // arithmetics.
+    //++t;
-    ++t;
 }
 
 template<typename T>