[committed] Trivial cleanup in ubsan_instrument_shift

[Marek Polacek]

While looking at something else I noticed that I should have used
type0 here.

Bootstrapped/regtested on x86_64-linux, applying to trunk.

2015-05-25  Marek Polacek  <polacek@redhat.com>

	* c-ubsan.c (ubsan_instrument_shift): Use type0.

--- gcc/c-family/c-ubsan.c
+++ gcc/c-family/c-ubsan.c
@@ -173,7 +173,7 @@ ubsan_instrument_shift (location_t loc, enum tree_code code,
      x < 0 || ((unsigned) x >> (uprecm1 - y))
      if > 1, is undefined.  */
   if (code == LSHIFT_EXPR
-      && !TYPE_UNSIGNED (TREE_TYPE (op0))
+      && !TYPE_UNSIGNED (type0)
       && (cxx_dialect >= cxx11))
     {
       tree x = fold_build2 (MINUS_EXPR, op1_utype, uprecm1,

	Marek