* gc.c: Fixup around GC by MALLOC. 
	  Add allocate size to malloc_increase before GC 
	  for updating limit in after_gc_sweep.
	  Reset malloc_increase into garbage_collect() 
	  for preventing GC again soon.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41325 b2dd03c8-39d4-4d8f-98ff-823fe69b080e