Fix for CPSecureTextField not being in nib2cib.

Closes #2.

Reviewed by me.

AppKit/CPSecureTextField.j

@@ -1,6 +1,6 @@
+
 @import "CPTextField.j"
 
-#include "Platform/Platform.h"
 
 @implementation CPSecureTextField : CPTextField
 {

AppKit/CPTextField.j

@@ -774,6 +774,10 @@ CPTextFieldStatePlaceholder = 1 << 13;
 
 var secureStringForString = function(aString)
 {
+    // This is true for when aString === "" and null/undefined.
+    if (!aString)
+        return "";
+
     var secureString = "",
         length = aString.length;
 

Tools/nib2cib/NSAppKit.j

@@ -40,6 +40,7 @@
 @import "NSScrollView.j"
 @import "NSScroller.j"
 @import "NSSet.j"
+@import "NSSecureTextField.j"
 @import "NSSegmentedControl.j"
 @import "NSSlider.j"
 @import "NSSplitView.j"