Different fix for the nasty stars problem, previous one swallowed the

ESC during alt+a playback.

Solved in the 'proper' way, which is not abusing the (while render)
ESC callback for UI draw of stars, this confused everything. Means;
you cannot esc stars drawing anymore. Nice feature, bad hack...

source/blender/renderconverter/intern/convertBlenderScene.c

@@ -317,15 +317,9 @@ void RE_make_stars(void (*initfunc)(void),
 					}
 				}
 			}
-//			if(done > MAXVERT) {
-//				printf("Too many stars\n");
-//				break;
-//			}
-			if(blender_test_break()) break;
+			/* do not call blender_test_break() here, since it is used in UI as well, confusing the callback system */
+			/* main cause is G.afbreek of course, a global again... (ton) */
 		}
-//		if(done > MAXVERT) break;
-
-		if(blender_test_break()) break;
 	}
 	if (termfunc) termfunc();
 }

source/blender/src/drawview.c

@@ -1839,7 +1839,6 @@ void drawview3dspace(ScrArea *sa, void *spacedata)
 				if(G.scene->world->mode & WO_STARS) {
 					RE_make_stars(star_stuff_init_func, star_stuff_vertex_func,
 								  star_stuff_term_func);
-					G.afbreek= 0; /* silly, stars draw uses blender_test_break(), can cause render to stop */
 				}
 			}
 			if(G.vd->flag & V3D_DISPBGPIC) draw_bgpic();

source/blender/src/renderwin.c

@@ -1022,6 +1022,7 @@ static void do_render(View3D *ogl_render_view3d, int anim, int force_dispwin)
 	
 	/* we set this flag to prevent renderwindow queue to execute another render */
 	R.flag= R_RENDERING;
+	G.afbreek= 0;
 
 	if (G.displaymode == R_DISPLAYWIN || force_dispwin) {
 		RE_set_initrenderdisplay_callback(NULL);
@@ -1051,7 +1052,6 @@ static void do_render(View3D *ogl_render_view3d, int anim, int force_dispwin)
 	}
 	waitcursor(1);
 
-	G.afbreek= 0;
 	if(G.obedit && !(G.scene->r.scemode & R_OGL)) {
 		exit_editmode(0);	/* 0 = no free data */
 	}