[kutil] Don't use delete on non-new pointers

`kutil::vector` was calling `operator delete []` on memory that had not
been allocated with `operator new []`, and so was deleting the wrong
pointer.

Tags: bug memory allocator

src/libraries/kutil/include/kutil/vector.h

@@ -61,7 +61,7 @@ public:
 	~vector()
 	{
 		while (m_size) remove();
-		delete [] m_elements;
+		m_alloc.free(m_elements);
 	}
 
 	/// Get the size of the array.