only push proper canvases to canvas pool

1 files changed, 4 insertions, 3 deletions

diff --git a/src/library_sdl.js b/src/library_sdl.js
index 50405bb0..b7d73862 100644
--- a/src/library_sdl.js
+++ b/src/library_sdl.js
@@ -361,9 +361,10 @@ var LibrarySDL = {
     },
 
     freeSurface: function(surf) {
-      SDL.canvasPool.push(SDL.surfaces[surf].canvas);
-      _free(SDL.surfaces[surf].buffer);
-      _free(SDL.surfaces[surf].pixelFormat);
+      var info = SDL.surfaces[surf];
+      if (!info.usePageCanvas && info.canvas) SDL.canvasPool.push(info.canvas);
+      _free(info.buffer);
+      _free(info.pixelFormat);
       _free(surf);
       SDL.surfaces[surf] = null;
     },