* gc.c (objspace_malloc_increase): don't cause GC by malloc_increase
  when memop type is MEMOP_TYPE_REALLOC.
  GC at realloc is not well maintained.
  We need a time to make it safe.
  [ruby-dev:48117]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e