fix: instrumentation build

Author: not-matthias

google_benchmark/include/benchmark/benchmark.h

@@ -1091,9 +1091,9 @@ inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::end() {
   StartKeepRunning();
 
 #ifdef CODSPEED_INSTRUMENTATION
-    if (parent_->codspeed_ != NULL) {
-      parent_->codspeed_->start_benchmark();
-    }
+  if (this->codspeed_ != NULL) {
+    this->codspeed_->start_benchmark(name_);
+  }
 #endif
 #if defined(CODSPEED_INSTRUMENTATION) || defined(CODSPEED_WALLTIME)
   measurement_start();