fixed MT render stopping and pausing bug,

some other changes

2.10/Source/Render.pas

@@ -74,6 +74,7 @@ type
     procedure SaveImage(const FileName: String); virtual;
 
     procedure Stop; virtual;
+    procedure Pause(paused: boolean); virtual;
 
     property OnProgress: TOnProgress
         read FOnProgress
@@ -285,6 +286,11 @@ begin
   FStop := True;
 end;
 
+procedure TBaseRenderer.Pause(paused: boolean);
+begin
+
+end;
+
 ///////////////////////////////////////////////////////////////////////////////
 destructor TBaseRenderer.Destroy;
 begin