Fix CTD when object blueprint is missing

src/game/object/creature.cpp

@@ -75,8 +75,10 @@ void Creature::loadFromGIT(const GffStruct &gffs) {
 
 void Creature::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> utc(Resources::instance().getGFF(resRef, ResourceType::Utc));
-    loadUTC(*utc);
-    loadAppearance();
+    if (utc) {
+        loadUTC(*utc);
+        loadAppearance();
+    }
 }
 
 void Creature::loadAppearance() {

src/game/object/door.cpp

@@ -63,6 +63,8 @@ void Door::loadFromGIT(const GffStruct &gffs) {
 
 void Door::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> utd(Resources::instance().getGFF(resRef, ResourceType::Utd));
+    if (!utd) return;
+
     loadUTD(*utd);
 
     shared_ptr<TwoDA> doors(Resources::instance().get2DA("genericdoors"));

src/game/object/encounter.h

@@ -49,7 +49,6 @@ private:
     };
 
     bool _active { false };
-    int _difficulty { 0 };
     int _difficultyIndex { 0 };
     Faction _faction { Faction::Invalid };
     int _maxCreatures { 0 };

src/game/object/encounter_blueprint.cpp

@@ -36,8 +36,7 @@ void Encounter::loadUTE(const GffStruct &ute) {
     _name = Strings::instance().get(ute.getInt("LocalizedName"));
     _blueprintResRef = boost::to_lower_copy(ute.getString("TemplateResRef"));
     _active = ute.getBool("Active");
-    _difficulty = ute.getInt("Difficulty");
-    _difficultyIndex = ute.getInt("DifficultyIndex");
+    _difficultyIndex = ute.getInt("DifficultyIndex"); // index into encdifficulty.2da
     _faction = ute.getEnum("Faction", Faction::Invalid);
     _maxCreatures = ute.getInt("MaxCreatures");
     _playerOnly = ute.getBool("PlayerOnly");
@@ -55,6 +54,7 @@ void Encounter::loadUTE(const GffStruct &ute) {
 
     // Unused fields:
     //
+    // - Difficulty (obsolete)
     // - SpawnOption (always 1)
     // - PaletteID (toolset only)
     // - Comment (toolset only)

src/game/object/item.cpp

@@ -37,7 +37,9 @@ Item::Item(uint32_t id) : Object(id, ObjectType::Item) {
 
 void Item::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> uti(Resources::instance().getGFF(resRef, ResourceType::Uti));
-    loadUTI(*uti);
+    if (uti) {
+        loadUTI(*uti);
+    }
 }
 
 void Item::playShotSound(int variant, glm::vec3 position) {

src/game/object/placeable.cpp

@@ -58,6 +58,8 @@ void Placeable::loadFromGIT(const GffStruct &gffs) {
 
 void Placeable::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> utp(Resources::instance().getGFF(resRef, ResourceType::Utp));
+    if (!utp) return;
+
     loadUTP(*utp);
 
     shared_ptr<TwoDA> placeables(Resources::instance().get2DA("placeables"));

src/game/object/sound.cpp

@@ -58,7 +58,9 @@ void Sound::loadFromGIT(const GffStruct &gffs) {
 
 void Sound::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> uts(Resources::instance().getGFF(resRef, ResourceType::Uts));
-    loadUTS(*uts);
+    if (uts) {
+        loadUTS(*uts);
+    }
 }
 
 void Sound::loadTransformFromGIT(const GffStruct &gffs) {

src/game/object/trigger.cpp

@@ -86,7 +86,9 @@ void Trigger::loadGeometryFromGIT(const GffStruct &gffs) {
 
 void Trigger::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> utt(Resources::instance().getGFF(resRef, ResourceType::Utt));
-    loadUTT(*utt);
+    if (utt) {
+        loadUTT(*utt);
+    }
 }
 
 void Trigger::update(float dt) {

src/game/object/waypoint.cpp

@@ -63,7 +63,9 @@ void Waypoint::loadFromGIT(const GffStruct &gffs) {
 
 void Waypoint::loadFromBlueprint(const string &resRef) {
     shared_ptr<GffStruct> utw(Resources::instance().getGFF(resRef, ResourceType::Utw));
-    loadUTW(*utw);
+    if (utw) {
+        loadUTW(*utw);
+    }
 }
 
 void Waypoint::loadTransformFromGIT(const GffStruct &gffs) {