Fix compatibility with pg18

Upstream commit postgres/postgres@525392d changed return type of ExecutorStart_hook API from void to bool.

Author: RekGRpth

pg_wait_sampling.c

@@ -73,7 +73,13 @@ static PlannedStmt *pgws_planner_hook(Query *parse,
 constchar*query_string,
 #endif
 intcursorOptions, ParamListInfoboundParams);
-staticvoidpgws_ExecutorStart(QueryDesc*queryDesc, inteflags);
+static
+#ifPG_VERSION_NUM >= 180000
+bool
+#else
+void
+#endif
+pgws_ExecutorStart(QueryDesc*queryDesc, inteflags);
 staticvoidpgws_ExecutorRun(QueryDesc*queryDesc,
 ScanDirectiondirection,
 uint64count
@@ -965,16 +971,21 @@ pgws_planner_hook(Query *parse,
 /*
  * ExecutorStart hook: save queryId for collector
  */
-staticvoid
+static
+#ifPG_VERSION_NUM >= 180000
+bool
+#else
+void
+#endif
 pgws_ExecutorStart(QueryDesc*queryDesc, inteflags)
 {
 inti=MyProc-ProcGlobal->allProcs;
 if (pgws_enabled(nesting_level))
 pgws_proc_queryids[i] =queryDesc->plannedstmt->queryId;
 if (prev_ExecutorStart)
-prev_ExecutorStart(queryDesc, eflags);
+returnprev_ExecutorStart(queryDesc, eflags);
 else
-standard_ExecutorStart(queryDesc, eflags);
+returnstandard_ExecutorStart(queryDesc, eflags);
 }
 
 staticvoid