fixed array element updating problem in JSONConfiguration

JSON/include/Poco/JSON/Array.h

@@ -154,6 +154,9 @@ public:
 	void add(const Dynamic::Var& value);
 		/// Add the given value to the array
 
+	void set(unsigned int index, const Dynamic::Var &value);
+		/// Update the element on the given index to specified value
+
 	void stringify(std::ostream& out, unsigned int indent = 0, int step = -1) const;
 		/// Prints the array to out. When indent has zero value,
 		/// the array will be printed without newline breaks and spaces between elements.
@@ -221,6 +224,13 @@ inline void Array::add(const Dynamic::Var& value)
 }
 
 
+inline void Array::set(unsigned int index, const Dynamic::Var &value)
+{
+	if (index >= _values.size()) _values.resize(index + 1);
+	_values[index] = value;
+}
+
+
 inline void Array::remove(unsigned int index)
 {
 	_values.erase(_values.begin() + index);

Util/src/JSONConfiguration.cpp

@@ -295,7 +295,7 @@ void JSONConfiguration::setValue(const std::string& key, const Poco::DynamicAny&
 			}
 			arr = nextArray;
 		}
-		arr->add(value);
+		arr->set(indexes.back(), value);
 	}
 
 	if (eventsEnabled())