Adds new constructor that makes the "variable" attribute required

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2279 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smackx/FormField.java

@@ -81,6 +81,16 @@ public class FormField {
     private List options = new ArrayList();
     private List values = new ArrayList();
 
+    /**
+     * Creates a new FormField with the variable name that uniquely identifies the field 
+     * in the context of the form. 
+     *  
+     * @param variable the variable name of the question.
+     */
+    public FormField(String variable) {
+        this.variable = variable;
+    }
+    
     /**
      * Returns a description that provides extra clarification about the question. This information
      * could be presented to the user either in tool-tip, help button, or as a section of text 
@@ -229,15 +239,6 @@ public class FormField {
         this.type = type;
     }
 
-    /**
-     * Returns the variable name that the question is filling out.
-     * 
-     * @param variable the variable name of the question. 
-     */
-    public void setVariable(String variable) {
-        this.variable = variable;
-    }
-
     /**
      * Adds a default value to the question if the question is part of a form to fill out. 
      * Otherwise, adds an answered value to the question.