reduce code size in remove fancybtn logic

fancy_demo/fancy.asc

@@ -81,31 +81,25 @@ int _get_new_fancybtn_index(int id) {
   return index;
 }
 
+void _set_fancybtn(int index, int id,  DynamicSprite* normal, DynamicSprite* over, DynamicSprite* pushed)
+{
+  _fancybtn[index].ID = id;
+  _fancybtn[index].Normal = normal;
+  _fancybtn[index].Over = over;
+  _fancybtn[index].Pushed = pushed;
+}
+
 void _remove_fancybtn(int id)
 {
   int index = _get_fancybtn_index(id);
   if(index != -1) return; // already removed
   for(int i=index; i<_fancybtn_count-1; i++) {
-    _fancybtn[i].ID = _fancybtn[i+1].ID;
-    _fancybtn[i].Normal = _fancybtn[i+1].Normal;
-    _fancybtn[i].Over = _fancybtn[i+1].Over;
-    _fancybtn[i].Pushed = _fancybtn[i+1].Pushed;
+    _set_fancybtn(i, _fancybtn[i+1].ID, _fancybtn[i+1].Normal, _fancybtn[i+1].Over, _fancybtn[i+1].Pushed);
   }
-  _fancybtn[_fancybtn_count-1].ID = -1;
-  _fancybtn[_fancybtn_count-1].Normal = null;
-  _fancybtn[_fancybtn_count-1].Over = null;
-  _fancybtn[_fancybtn_count-1].Pushed = null;
+  _set_fancybtn(_fancybtn_count-1, -1, null, null, null);
   _fancybtn_count--;
 }
 
-void _set_fancybtn(int index, int id,  DynamicSprite* normal, DynamicSprite* over, DynamicSprite* pushed)
-{
-  _fancybtn[index].ID = id;
-  _fancybtn[index].Normal = normal;
-  _fancybtn[index].Over = over;
-  _fancybtn[index].Pushed = pushed;
-}
-
 #region TEXT_TOKEN_REG
 managed struct TokenState {
   int color;