S/390: Add missing brackets.

gcc/ChangeLog:

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

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

From-SVN: r227780

gcc/ChangeLog

+2015-09-15  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
+        * config/s390/s390.c (s390_const_operand_ok): Add missing
+	brackets.
+
 2015-09-15  Richard Biener  <rguenther@suse.de>
 
 	PR lto/67568

gcc/config/s390/s390.c

@@ -728,7 +728,7 @@ s390_const_operand_ok (tree arg, int argnum, int op_flags, tree decl)
 		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;
 	}