added function to check whether a vector has a zero element

src/storm/utility/vector.h

@@ -1121,6 +1121,11 @@ namespace storm {
                 return std::any_of(v.begin(), v.end(), [](T value){return !storm::utility::isZero(value);});
             }
             
+            template<typename T>
+            bool hasZeroEntry(std::vector<T> const& v){
+                return std::any_of(v.begin(), v.end(), [](T value){return storm::utility::isZero(value);});
+            }
+
             inline std::set<storm::RationalFunctionVariable> getVariables(std::vector<storm::RationalFunction> const& vector) {
                 std::set<storm::RationalFunctionVariable> result;
                 for(auto const& entry : vector) {