javascript-101/scope.md: Fix first two code samples.

Closes jquerygh-545

The original sample below will really give out a Reference Error since the function wasn't called in the first place.

function myFunc() { x = 5; }
console.log( x ); // 5

Author: redbagmoving

page/javascript-101/scope.md

@@ -28,6 +28,8 @@ function myFunc() {
 	var x = 5;
 }
 
+myFunc();
+
 console.log( x ); // ReferenceError: x is not defined
 ```
 
@@ -42,6 +44,8 @@ function myFunc() {
 	x = 5;
 }
 
+myFunc();
+
 console.log( x ); // 5
 ```