[ARC] Fix missing brackets in arc.c

[Richard Sandiford]

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

Tested on arc-elf and committed as obvious.

Thanks,
Richard


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

diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 3bce7ef..98c7298 100644
--- a/gcc/config/arc/arc.c
+++ b/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;