Merge pull request #30 from robert-hrusecky/infinite_fall_memory

Infinite fall memory fix for #14

examples2d/all_examples2.rs

@@ -14,6 +14,7 @@ mod add_remove2;
 mod collision_groups2;
 mod damping2;
 mod debug_box_ball2;
+mod debug_infinite_fall;
 mod heightfield2;
 mod joints2;
 mod platform2;
@@ -64,6 +65,7 @@ pub fn main() {
         ("Restitution", restitution2::init_world),
         ("Sensor", sensor2::init_world),
         ("(Debug) box ball", debug_box_ball2::init_world),
+        ("(Debug) infinite fall", debug_infinite_fall::init_world),
     ];
 
     // Lexicographic sort, with stress tests moved at the end of the list.