Added declarations for some undeclared variables. (#210)

Author: FilippoPolo

src/idd/idd.animation.js

@@ -55,6 +55,11 @@ InteractiveDataDisplay.PanZoomAnimation = function () {
     var screenSize = undefined;
     var startPlotRect = undefined;
     var estimatedPlotRect = undefined;
+    var startCS = undefined;
+
+    var startScreenCenter = undefined;
+    var previousFrameScreenCenter = undefined;
+    var endScreenCenter = undefined;
 
     var prevTime = new Date();
     var prevFramePlotRect = undefined;

src/idd/idd.navigation.js

@@ -12,8 +12,8 @@ InteractiveDataDisplay.Navigation = function (_plot, _setVisibleRegion) {
         var screenWidth = plot.screenSize.width;
         var screenHeight = plot.screenSize.width;            
 
-        ct = plot.coordinateTransform;
-        vis = ct.getPlotRect({ x: 0, y: 0, width: screenWidth, height: screenHeight });
+        var ct = plot.coordinateTransform;
+        var vis = ct.getPlotRect({ x: 0, y: 0, width: screenWidth, height: screenHeight });
 
         var scaleToReport = screenWidth/vis.width;
         //console.log('navigation: plot x='+vis.x+' y='+vis.y+' w='+vis.width+' h='+vis.height);