[tree-ssa] Nit cleanup

[law@redhat.com]

A trivial cleanup I noticed while working on some code to eliminate
useless crud in the tree structures.    It just moves the
call to rewrite_out_of_ssa into the same conditional as the
call to rewrite_into_ssa.


	* tree-optimize.c (optimize_function_tree): Simplify slightly.

Index: tree-optimize.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/Attic/tree-optimize.c,v
retrieving revision 1.1.4.35
diff -c -3 -p -r1.1.4.35 tree-optimize.c
*** tree-optimize.c	18 Apr 2003 05:07:24 -0000	1.1.4.35
--- tree-optimize.c	25 Apr 2003 23:44:31 -0000
*************** optimize_function_tree (fndecl)
*** 89,98 ****
  
        if (flag_tree_dce)
  	tree_ssa_dce (fndecl);
-     }
  
-   if (n_basic_blocks > 0 && ! (errorcount || sorrycount))
-     {
        /* Rewrite the function out of SSA form.  */
        rewrite_out_of_ssa (fndecl);
      }
--- 89,95 ----