Merging r6275 through r6286 from trunk to ogl-es branch

- Fixing warnings
- Updating bzip2 and zlib libraries


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6287 dfc29bdd-3216-0410-991c-e03cc46cb475

include/irrMap.h

@@ -453,13 +453,6 @@ class map
 		return Cur;
 	}
 
-	ParentFirstIterator& operator=(const ParentFirstIterator& src)
-	{
-		Root = src.Root;
-		Cur = src.Cur;
-		return (*this);
-	}
-
 	void operator++(int)
 	{
 		inc();
@@ -552,13 +545,6 @@ class map
 			return Cur;
 		}
 
-		ParentLastIterator& operator=(const ParentLastIterator& src)
-		{
-			Root = src.Root;
-			Cur = src.Cur;
-			return (*this);
-		}
-
 		void operator++(int)
 		{
 			inc();