<iterator>, <stdlib.h> and <ctype.h> includes required for QNX compiler

src/osgShadow/ConvexPolyhedron.cpp

@@ -22,6 +22,7 @@
 #include<cassert>
 #include<deque>
 #include<algorithm>
+#include<iterator>
 
 #include <stdio.h>
 #include <string.h>