Fix #33405: preview render getting stuck in a particular .blend file, ObjectKey

operator< had wrong brackets, changed it now to be more clear.

Fix #33404: crash GPU rendering with OSL option still enabled. There was a check
to disable OSL in this case, but it shouldn't have modified scene->params because
this is used for comparison in scene->modified().

intern/cycles/render/shader.cpp

@@ -121,12 +121,12 @@ ShaderManager::~ShaderManager()
 {
 }
 
-ShaderManager *ShaderManager::create(Scene *scene)
+ShaderManager *ShaderManager::create(Scene *scene, int shadingsystem)
 {
 	ShaderManager *manager;
 
 #ifdef WITH_OSL
-	if(scene->params.shadingsystem == SceneParams::OSL)
+	if(shadingsystem == SceneParams::OSL)
 		manager = new OSLShaderManager();
 	else
 #endif