fixed compile with lazarus main

src/fresnel.lclcontrols.pas

@@ -6,7 +6,7 @@ interface
 
 uses
   Classes, SysUtils, Types, Math, FPImage, Fresnel.DOM, Fresnel.Layouter,
-  Fresnel.Controls, fresnel.renderer, AvgLvlTree, Laz_AVL_Tree, LazLoggerBase,
+  Fresnel.Controls, fresnel.renderer, AvgLvlTree, LazLoggerBase,
   Graphics, Controls, LCLIntf, Forms, LCLStrConsts, LResources, fresnel.events;
 
 type
@@ -1010,7 +1010,7 @@ end;
 
 destructor TFresnelLCLFontEngine.Destroy;
 var
-  Node: TAVLTreeNode;
+  Node: TAvgLvlTreeNode;
   aFont: TFresnelLCLFont;
 begin
   Node:=FFonts.Root;
@@ -1028,7 +1028,7 @@ end;
 function TFresnelLCLFontEngine.FindFont(const Desc: TFresnelFontDesc
   ): TFresnelLCLFont;
 var
-  Node: TAVLTreeNode;
+  Node: TAvgLvlTreeNode;
 begin
   Node:=FFonts.FindKey(@Desc,@CompareFresnelFontDescWithLCLFont);
   if Node=nil then