workaround for bug in clang (bug report filed)

src/storm/utility/constants.cpp

@@ -163,13 +163,26 @@ namespace storm {
         
         template<typename ValueType>
         ValueType minimum(std::vector<ValueType> const& values) {
-            return minmax(values).first;
+            assert(!values.empty());
+            ValueType min = values.front();
+            for (auto const& vt : values) {
+                if (vt < min) {
+                    min = vt;
+                }
+            }
+            return min;
         }
-        
         
         template<typename ValueType>
         ValueType maximum(std::vector<ValueType> const& values) {
-            return minmax(values).second;
+            assert(!values.empty());
+            ValueType max = values.front();
+            for (auto const& vt : values) {
+                if (vt > max) {
+                    max = vt;
+                }
+            }
+            return max;
         }
         
         template<typename K, typename ValueType>