fix new warning

[Mike Stump]

This fixes a warning....  Applied as obvious.



Index: ChangeLog
===================================================================
--- ChangeLog   (revision 186201)
+++ ChangeLog   (working copy)
@@ -1,3 +1,7 @@
+2012-04-06  Mike Stump  <mikest...@comcast.net>
+
+       * gimple-fold.c (gimple_fold_stmt_to_constant_1): Avoid warning.
+
 2012-04-06  Oleg Endo  <olege...@gcc.gnu.org>
 
        * config/sh/sh.c (hi_const): Remove.
Index: gimple-fold.c
===================================================================
--- gimple-fold.c       (revision 186111)
+++ gimple-fold.c       (working copy)
@@ -2427,7 +2427,7 @@ gimple_fold_stmt_to_constant_1 (gimple s
              else if (TREE_CODE (rhs) == ADDR_EXPR
                       && !is_gimple_min_invariant (rhs))
                {
-                 HOST_WIDE_INT offset;
+                 HOST_WIDE_INT offset = 0;
                  tree base;
                  base = get_addr_base_and_unit_offset_1 (TREE_OPERAND (rhs, 0),
                                                          &offset,