more sysasserts for allocator/gc

todo.txt

@@ -1,21 +1,17 @@
 version 0.8.14
 ==============
 
-- fix memory corruption bug triggered by visual c++ in release mode:
-  * sysasserts in incref
-  * force full collection in ccgstmts.nim
+- fix tsortdev bugs
 - fix line info in assertions
-- fix remaining generics bugs
-
 
 version 0.9.0
 =============
 
+- fix remaining generics bugs
 - GC: marker procs for native Nimrod GC and Boehm GC; precise stack marking;
   escape analysis for string/seq seems to be easy to do too;
   even further write barrier specialization
 - dead code elim for JS backend; 'of' operator for JS backend
-- test the sort implementation again
 - const ptr/ref
 - unsigned ints and bignums; requires abstract integer literal type: 
   use tyInt+node for that