Fix Py_STATS build

Author: markshannon

Modules/gcmodule.c

@@ -1436,10 +1436,8 @@ gc_collect_increment(PyThreadState *tstate, struct gc_collection_stats *stats)
     validate_old(gcstate);
     PyGC_Head increment;
     gc_list_init(&increment);
-    //fprintf(stderr, "Incremental GC progress %d\n", (int)gcstate->incremental_gc_progress);
     Py_ssize_t work_to_do = -gcstate->incremental_gc_progress;
     Py_ssize_t region_size = 0;
-    //fprintf(stderr, "Work to do %d\n", (int)work_to_do);
     validate_old(gcstate);
     if (gc_list_is_empty(oldest)) {
         if (gc_list_is_empty(aging)) {
@@ -1486,7 +1484,6 @@ gc_collect_increment(PyThreadState *tstate, struct gc_collection_stats *stats)
     add_stats(gcstate, 1, stats);
 }
 
-
 static void
 gc_collect_full(PyThreadState *tstate,
                 struct gc_collection_stats *stats)
@@ -1519,7 +1516,6 @@ gc_collect_full(PyThreadState *tstate,
     add_stats(gcstate, 2, stats);
 }
 
-
 /* This is the main function.  Read this to understand how the
  * collection process works. */
 static void
@@ -2536,7 +2532,7 @@ _Py_RunGC(PyThreadState *tstate)
     gcstate->collecting = 1;
     struct gc_collection_stats stats = { 0 };
 
-    GC_STAT_ADD(gen, collections, 1);
+    GC_STAT_ADD(stats_gen, collections, 1);
 
     invoke_gc_callback(gcstate, "start", gcstate->incremental_next, &stats);
     if (gcstate->incremental_next) {