Port member initialization from constructor to declaration (C++11)

Using `clang-tidy`'s `modernize-use-default-member-init` check and
manual review of the changes, and some extra manual changes that
`clang-tidy` failed to do.

Also went manually through all of `core` to find occurrences that
`clang-tidy` couldn't handle, especially all initializations done
in a constructor without using initializer lists.

1 files changed, 3 insertions, 3 deletions

diff --git a/modules/bullet/constraint_bullet.h b/modules/bullet/constraint_bullet.h
index 1946807bad..125940439f 100644
--- a/modules/bullet/constraint_bullet.h
+++ b/modules/bullet/constraint_bullet.h
@@ -47,9 +47,9 @@ class btTypedConstraint;
 class ConstraintBullet : public RIDBullet {
 
 protected:
-	SpaceBullet *space;
-	btTypedConstraint *constraint;
-	bool disabled_collisions_between_bodies;
+	SpaceBullet *space = nullptr;
+	btTypedConstraint *constraint = nullptr;
+	bool disabled_collisions_between_bodies = true;
 
 public:
 	ConstraintBullet();