Made down offset a constant.

Change-Id: Ic0e3aa3867dbdce4037cbac23dc26999487c1489
diff --git a/y2016/constants.cc b/y2016/constants.cc
index 8b76c3b..a4f5964 100644
--- a/y2016/constants.cc
+++ b/y2016/constants.cc
@@ -71,6 +71,7 @@
             0.0, 0.3},
           },
 
+          0.0,
           "practice",
       };
       break;
@@ -106,6 +107,7 @@
             -1.040454, 1.5},
           },
 
+          0.0,
           "competition",
       };
       break;
@@ -137,6 +139,7 @@
             -0.005145, 1.3},
           },
 
+          0.011,
           "practice",
       };
       break;