Modernize project codebase (#906)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

* Add safety checks and fix a issue with vector going OOR

1 files changed, 2 insertions, 2 deletions

diff --git a/Minecraft.World/FollowOwnerGoal.cpp b/Minecraft.World/FollowOwnerGoal.cpp
index 8565d782..89ec4643 100644
--- a/Minecraft.World/FollowOwnerGoal.cpp
+++ b/Minecraft.World/FollowOwnerGoal.cpp
@@ -25,7 +25,7 @@ FollowOwnerGoal::FollowOwnerGoal(TamableAnimal *tamable, double speedModifier, f
 bool FollowOwnerGoal::canUse()
 {
 	shared_ptr<LivingEntity> owner = dynamic_pointer_cast<LivingEntity>( tamable->getOwner() );
-	if (owner == NULL) return false;
+	if (owner == nullptr) return false;
 	if (tamable->isSitting()) return false;
 	if (tamable->distanceToSqr(owner) < startDistance * startDistance) return false;
 	this->owner = weak_ptr<LivingEntity>(owner);
@@ -34,7 +34,7 @@ bool FollowOwnerGoal::canUse()
 
 bool FollowOwnerGoal::canContinueToUse()
 {
-	return owner.lock() != NULL && !navigation->isDone() && tamable->distanceToSqr(owner.lock()) > stopDistance * stopDistance && !tamable->isSitting();
+	return owner.lock() != nullptr && !navigation->isDone() && tamable->distanceToSqr(owner.lock()) > stopDistance * stopDistance && !tamable->isSitting();
 }
 
 void FollowOwnerGoal::start()