ChangeActorFace: Fix OOB reads

Fixes an Issue similar to #3320

Author: jetrotal

src/game_interpreter.cpp

@@ -2127,17 +2127,26 @@ bool Game_Interpreter::CommandChangeSpriteAssociation(lcf::rpg::EventCommand con
 }
 
 bool Game_Interpreter::CommandChangeActorFace(lcf::rpg::EventCommand const& com) { // code 10640
-	int id = ValueOrVariableBitfield(com, 2, 0, 0);
-	Game_Actor* actor = Main_Data::game_actors->GetActor(id);
+	int actor_id = ValueOrVariableBitfield(com, 2, 0, 0);
+	Game_Actor* actor = Main_Data::game_actors->GetActor(actor_id);
 
 	if (!actor) {
-		Output::Warning("CommandChangeActorFace: Invalid actor ID {}", id);
+		Output::Warning("CommandChangeActorFace: Invalid actor ID {}", actor_id);
 		return true;
 	}
 
-	actor->SetFace(
-			ToString(CommandStringOrVariableBitfield(com, 2, 1, 3)),
-			ValueOrVariableBitfield(com, 2, 2, 1));
+	std::string face;
+	if (com.parameters.size() > 1) {
+		face = ToString(CommandStringOrVariableBitfield(com, 2, 1, 3));
+	} else face = ToString(com.string);
+
+	int face_id;
+	if (com.parameters.size() > 2) {
+		face_id = ValueOrVariableBitfield(com, 2, 2, 1);
+	}
+	else face_id = com.parameters[1];
+
+	actor->SetFace(face, face_id);
 	return true;
 }