Merge branch 'fix-fall-void' into 'master'

Temporary fix for falling into the void

See merge request veloren/veloren!122

Former-commit-id: ba8dc7b88bb06a0e9633475a40dbd58af53ecd69

common/src/sys/phys.rs

@@ -28,6 +28,13 @@ impl<'a> System<'a> for Sys {
             // Movement
             pos.0 += vel.0 * dt.0;
 
+            // Don't fall into the void
+            // TODO: This shouldn't be needed when we have proper physics and chunk loading
+            if pos.0.z < 0.0 {
+                pos.0.z = 0.0;
+                vel.0.z = 0.0;
+            }
+
             // Basic collision with terrain
             let mut i = 0;
             while terrain