Fix: compile error due to non-matching type and strict flags for MSVC9

This fixes a small compile error where MSVC9 complains about conversion from int to unsigned char.

source/blender/blenkernel/intern/object_dupli.c

@@ -780,7 +780,7 @@ static void make_duplis_faces(const DupliContext *ctx)
 	bool for_render = ctx->eval_ctx->for_render;
 	FaceDupliData fdd;
 
-	fdd.use_scale = parent->transflag & OB_DUPLIFACES_SCALE;
+	fdd.use_scale = ((parent->transflag & OB_DUPLIFACES_SCALE) != 0);
 
 	/* gather mesh info */
 	{