Add new parameter to array reallocate function. This prevents a reallocation...

Add new parameter to array reallocate function. This prevents a reallocation in case the array would become smaller. As the reallocation operation is quite time consuming, this can be avoided on request now, on the expense of more memory consumption.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4261 dfc29bdd-3216-0410-991c-e03cc46cb475

include/irrArray.h

@@ -59,11 +59,17 @@ public:
 
 
 	//! Reallocates the array, make it bigger or smaller.
-	/** \param new_size New size of array. */
-	void reallocate(u32 new_size)
+	/** \param new_size New size of array.
+	\param canShrink Specifies whether the array is reallocated even if
+	enough space is available. Setting this flag to false can speed up
+	array usage, but may use more memory than required by the data.
+	*/
+	void reallocate(u32 new_size, bool canShrink=true)
 	{
 		if (allocated==new_size)
 			return;
+		if (!canShrink && (new_size < allocated))
+			return;
 
 		T* old_data = data;