Fixed a documentation issue in the shader node definition wizard

sdk/jme3-materialeditor/src/com/jme3/gde/shadernodedefinition/ShaderNodeSource

@@ -1,9 +1,11 @@
+          
+void main(){
     <#list inputParams as param>                
     //@input ${param[0]} ${param[1]} ${param[2]}
     </#list>
     <#list outputParams as param>                
     //@output ${param[0]} ${param[1]} ${param[2]}
     </#list>  
-void main(){
+
     //insert glsl code here
 }

sdk/jme3-materialeditor/src/com/jme3/gde/shadernodedefinition/wizard/SNDefVisualPanel2.java

@@ -35,6 +35,9 @@ public final class SNDefVisualPanel2 extends JPanel {
 
     public String[][] getData() {
        
+        varTable.editCellAt(-1, -1);
+        varTable.getSelectionModel().clearSelection();
+       
         DefaultTableModel model = (DefaultTableModel) varTable.getModel();
         String[][] data = new String[model.getRowCount()][3];
         for (int i = 0; i < model.getRowCount(); i++) {