kv/memdb: fix uninitialized return of MemDB::_init().

Without this fix GCC complains:

```
src/kv/MemDB.cc:179:10: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  179 |   return r;
```

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>

diff --git a/src/kv/MemDB.cc b/src/kv/MemDB.cc
index 4846042e1fe3a7093eadf4ce3a309d5793538a9c..465aab9e999cd472b33ad1865bf991298b8de1af 100644 (file)
--- a/src/kv/MemDB.cc
+++ b/src/kv/MemDB.cc
@@ -151,7 +151,7 @@ int MemDB::_load()
 
 int MemDB::_init(bool create)
 {
-  int r;
+  int r = 0;
   dout(1) << __func__ << dendl;
   if (create) {
     if (fs::exists(m_db_path)) {