Merge from 1.7 branch, revisions 3389-3419. Only a valgrind warning in...

Merge from 1.7 branch, revisions 3389-3419. Only a valgrind warning in heapsort. Also skipped the date bump, which would cause too many conflicts. Will be changed later on manually.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3420 dfc29bdd-3216-0410-991c-e03cc46cb475

include/heapsort.h

@@ -53,9 +53,8 @@ inline void heapsort(T* array_, s32 size)
 	for (i=((size-1)/2); i>=0; --i)
 		heapsink(virtualArray, i+1, virtualSize-1);
 
-	// sort array
-
-	for (i=size-1; i>=0; --i)
+	// sort array, leave out the last element (0)
+	for (i=size-1; i>0; --i)
 	{
 		T t = array_[0];
 		array_[0] = array_[i];