8274785: ciReplay: Potential crash due to uninitialized Compile::_ilt variable

Reviewed-by: neliasso, kvn

src/hotspot/share/opto/compile.cpp

@@ -549,6 +549,7 @@ Compile::Compile( ciEnv* ci_env, ciMethod* target, int osr_bci,
                   _do_locks_coarsening(do_locks_coarsening),
                   _method(target),
                   _entry_bci(osr_bci),
+                  _ilt(NULL),
                   _stub_function(NULL),
                   _stub_name(NULL),
                   _stub_entry_point(NULL),