[Committed] S/390: Add missing brackets

[Andreas Krebbel]

gcc/ChangeLog:

2015-09-15  Andreas Krebbel  <kreb...@linux.vnet.ibm.com>

        * config/s390/s390.c (s390_const_operand_ok): Add missing
        brackets.

Index: gcc/config/s390/s390.c
===================================================================
--- gcc/config/s390/s390.c      (revision 227779)
+++ gcc/config/s390/s390.c      (working copy)
@@ -728,7 +728,7 @@
                HOST_WIDE_INT_PRINT_DEC ".."
                HOST_WIDE_INT_PRINT_DEC ")",
                argnum, decl,
-               -(HOST_WIDE_INT)1 << (bitwidth - 1),
+               -((HOST_WIDE_INT)1 << (bitwidth - 1)),
                ((HOST_WIDE_INT)1 << (bitwidth - 1)) - 1);
          return false;
        }