PATCH: Don't print bb info when CFG isn't up to date

[Jeffrey A Law]

  In message <200012292353.SAA06685@hiauly1.hia.nrc.ca>you write:
  > The enclosed patch prevents miscellaneous garbage being printed after
  > the jump2 pass when dumping rtl.  I have also noticed that print_rtl_with_b
  > b
  > may cause a SEG fault if jump2 eliminates all the instructions in a
  > block.
  > 
  > Please review and install if ok.
  > 
  > Dave
  > -- 
  > J. David Anglin                                  dave.anglin@nrc.ca
  > National Research Council of Canada              (613) 990-0752 (FAX: 952-6
  > 605)
  > 
  > 2000-12-29  John David Anglin  <dave@hiauly1.hia.nrc.ca>
  > 
  > 	* toplev.c (rest_of_compilation): Don't print basic block information
  > 	when CFG isn't up to date.
Thanks.  Installed.
jeff