Fix missing brackets in arc.c

The old code still built thanks to the brackets in the definition
of XVECEXP.

gcc/
	* config/arc/arc.c (arc_loop_hazard): Add missing brackets.

From-SVN: r242473

gcc/ChangeLog

+2016-11-16  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/arc/arc.c (arc_loop_hazard): Add missing brackets.
+
 2016-11-16  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	PR target/78364

gcc/config/arc/arc.c

@@ -7812,7 +7812,7 @@ arc_loop_hazard (rtx_insn *pred, rtx_insn *succ)
     jump = pred;
   else if (GET_CODE (PATTERN (pred)) == SEQUENCE
 	   && JUMP_P (XVECEXP (PATTERN (pred), 0, 0)))
-    jump = as_a <rtx_insn *> XVECEXP (PATTERN (pred), 0, 0);
+    jump = as_a <rtx_insn *> (XVECEXP (PATTERN (pred), 0, 0));
   else
     return false;