Protect Array<> and HashMap<> instances against self assignments

svn-id: r26115

common/array.h

@@ -100,6 +100,9 @@ public:
 	}
 
 	Array<T>& operator  =(const Array<T>& array) {
+		if (this == &array)
+			return *this;
+
 		if (_data)
 			delete [] _data;
 		_size = array._size;

common/hashmap.h

@@ -155,6 +155,9 @@ public:
 	~HashMap();
 
 	HM_t &operator =(const HM_t &map) {
+		if (this == &map)
+			return *this;
+
 		// Remove the previous content and ...
 		clear();
 		delete[] _arr;