Removed include render.h

It *should* be there, but its a bad-level-include. The bad_level_calls.h
makes it compiling nice, but that wasnt the purpose.
Error is in the winstuff.h in render.h most likely

source/blender/blenkernel/intern/material.c

@@ -59,8 +59,6 @@
 
 #include "BPY_extern.h"
 
-#include "render.h"
-
 void free_material(Material *ma)
 {
 	int a;