Fix BG rendering

SMILEBASIC/petitcomputer.d

@@ -642,14 +642,6 @@ class PetitComputer
                     version(test) glRotatef(rot_test_deg, rot_test_x, rot_test_y, rot_test_z);
                     glBindTexture(GL_TEXTURE_2D, graphic.GRP[bgpage].glTexture);
 
-                    if (BGvisibles[0])
-                    {
-                        for(int i = 0; i < bgmax; i++)
-                        {
-                            bg[i].render(400f, 240f);
-                        }
-                    }
-
                     if (BGvisibles[0])
                     {
                         chRenderingDisplay(0);