fix syntax

tests/webcam.ce

@@ -1,6 +1,6 @@
 // Test webcam display
-var draw2d
-var graphics
+var draw2d = null
+var graphics = null
 var os = use('os');
 var input = use('input')
 var json = use('json')
@@ -88,7 +88,8 @@ send(video_actor, {
     
     // Look for a 640x480 format with preferred colorspace
     var preferred_format = null;
-    for (var i = 0; i < length(formats); i++) {
+    var i = 0;
+    for (i = 0; i < length(formats); i++) {
       if (formats[i].width == 640 && formats[i].height == 480) {
         preferred_format = formats[i];
         // Prefer JPEG or sRGB colorspace if available