services: Consistently use InterlockedIncrement to increment refcount.

programs/services/rpc.c

@@ -114,7 +114,7 @@ static void run_after_timeout(void (*func)(struct service_entry*), struct servic
         return;
     }
 
-    service->ref_count++;
+    InterlockedIncrement(&service->ref_count);
     elem->func = func;
     elem->service_entry = service;
 

programs/services/services.c

@@ -299,7 +299,7 @@ static void scmdatabase_autostart_services(struct scmdatabase *db)
                 services_list = slist_new;
             }
             services_list[i] = service;
-            service->ref_count++;
+            InterlockedIncrement(&service->ref_count);
             i++;
         }
     }