rgw: Initialize pointer field in RGWLC

Fixes the Coverity Scan Report:
CID 1396146 (#1 of 1): Uninitialized pointer field (UNINIT_CTOR)
2. uninit_member: Non-static class member max_objs is not initialized in this constructor nor in any functions that it calls.
4. uninit_member: Non-static class member obj_names is not initialized in this constructor nor in any functions that it calls.

Signed-off-by: Jos Collin <jcollin@redhat.com>

src/rgw/rgw_lc.h

@@ -242,8 +242,8 @@ WRITE_CLASS_ENCODER(RGWLifecycleConfiguration)
 class RGWLC {
   CephContext *cct;
   RGWRados *store;
-  int max_objs;
-  string *obj_names;
+  int max_objs{0};
+  string *obj_names{nullptr};
   std::atomic<bool> down_flag = { false };
   string cookie;