Fix compilation failure with C++98 compilers

	* opt-problem.h (opt_wrapper): Use template-argument-list when naming
	the base class, because using the injected-class-name was not clearly
	specified until DR 176.

From-SVN: r265140

gcc/ChangeLog

+2018-10-13  Jonathan Wakely  <jwakely@redhat.com>
+
+	* opt-problem.h (opt_wrapper): Use template-argument-list when naming
+	the base class, because using the injected-class-name was not clearly
+	specified until DR 176.
+
 2018-10-12  Paul Koning  <ni1d@arrl.net>
 
 	* config/pdp11/pdp11.md (doloop_end): New expander.

gcc/opt-problem.h

@@ -214,7 +214,7 @@ class opt_result : public opt_wrapper <bool>
   /* Private ctor.  Instances should be created by the success and failure
      static member functions.  */
   opt_result (wrapped_t result, opt_problem *problem)
-  : opt_wrapper (result, problem)
+  : opt_wrapper <bool> (result, problem)
   {}
 };