jshint fixes, fix global leak

js/id/behavior/add_way.js

@@ -1,5 +1,5 @@
 iD.behavior.AddWay = function(context) {
-    var event = d3.dispatch('start', 'startFromWay', 'startFromNode')
+    var event = d3.dispatch('start', 'startFromWay', 'startFromNode'),
         draw = iD.behavior.Draw(context);
 
     var addWay = function(surface) {

js/id/core/history.js

@@ -187,7 +187,7 @@ iD.History = function(context) {
                     annotation: i.annotation,
                     imagery_used: i.imagery_used,
                     entities: i.graph.entities
-                }
+                };
             }));
 
             context.storage(getKey('history'), json);

js/id/svg.js

@@ -41,6 +41,6 @@ iD.svg = {
                 }
             });
             return tags;
-        }
+        };
     }
 };

js/id/ui/source_switch.js

@@ -21,5 +21,5 @@ iD.ui.SourceSwitch = function(context) {
             .text(t('source_switch.live'))
             .classed('live', true)
             .on('click', click);
-    }
+    };
 };