Fix error location for cilk error message

Output the correct location for an existing cilk error message.

gcc/c-family/:

2014-11-10  Andi Kleen  <ak@linux.intel.com>

	* cilk.c (recognize_spawn): Use expression location
	for error message.

From-SVN: r217333

gcc/c-family/ChangeLog

+2014-11-10  Andi Kleen  <ak@linux.intel.com>
+
+	* cilk.c (recognize_spawn): Use expression location
+	for error message.
+
 2014-11-10  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* c.opt ([Wshift-count-negative, Wshift-count-overflow]): Add.

gcc/c-family/cilk.c

@@ -247,7 +247,7 @@ recognize_spawn (tree exp, tree *exp0)
     }
   /* _Cilk_spawn can't be wrapped in expression such as PLUS_EXPR.  */
   else if (contains_cilk_spawn_stmt (exp))
-    error ("invalid use of %<_Cilk_spawn%>");
+    error_at (EXPR_LOCATION (exp), "invalid use of %<_Cilk_spawn%>");
   return spawn_found;
 }