[patch] Fix CFG dumping of blocks with no predecessors or successors

[Steven Bosscher]

Will commit as obvious.

* cfg.c (dump_bb_info): Print a newline if there were no edges to dump.

Index: cfg.c
===================================================================
--- cfg.c       (revision 190785)
+++ cfg.c       (working copy)
@@ -764,6 +764,8 @@ dump_bb_info (FILE *outf, basic_block bb, int inde
          dump_edge_info (outf, e, flags, 0);
          fputc ('\n', outf);
        }
+      if (first)
+       fputc ('\n', outf);
     }

   if (do_footer)
@@ -784,6 +786,8 @@
          dump_edge_info (outf, e, flags, 1);
          fputc ('\n', outf);
        }
+      if (first)
+       fputc ('\n', outf);
     }
 }