Cycles: Fix difference between SVM and OSL implementation of Normal node

SVM was normalizing the input normal, OSL did not. This lead to render
result differences across this shading systems.

intern/cycles/kernel/shaders/node_normal.osl

@@ -23,6 +23,6 @@ shader node_normal(
 	output float Dot = 1.0)
 {
 	NormalOut = normalize(Direction);
-	Dot = dot(NormalOut, NormalIn);
+	Dot = dot(NormalOut, normalize(NormalIn));
 }