Fix valgrind failure caused by recent checked-in.

Summary: Initialize un-initialized parameters

Test Plan: run the failed test (c_test)

Reviewers: yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21249

db/db_impl.cc

@@ -4353,8 +4353,8 @@ const Options& DBImpl::GetOptions(ColumnFamilyHandle* column_family) const {
 
 bool DBImpl::GetProperty(ColumnFamilyHandle* column_family,
                          const Slice& property, std::string* value) {
-  bool is_int_property;
+  bool is_int_property = false;
-  bool need_out_of_mutex;
+  bool need_out_of_mutex = false;
   DBPropertyType property_type =
       GetPropertyType(property, &is_int_property, &need_out_of_mutex);
 
@@ -4378,8 +4378,8 @@ bool DBImpl::GetProperty(ColumnFamilyHandle* column_family,
 
 bool DBImpl::GetIntProperty(ColumnFamilyHandle* column_family,
                             const Slice& property, uint64_t* value) {
-  bool is_int_property;
+  bool is_int_property = false;
-  bool need_out_of_mutex;
+  bool need_out_of_mutex = false;
   DBPropertyType property_type =
       GetPropertyType(property, &is_int_property, &need_out_of_mutex);
   if (!is_int_property) {

db/internal_stats.cc

@@ -93,10 +93,10 @@ DBPropertyType GetPropertyType(const Slice& property, bool* is_int_property,
   Slice in = property;
   Slice prefix("rocksdb.");
   *need_out_of_mutex = false;
+  *is_int_property = false;
   if (!in.starts_with(prefix)) return kUnknown;
   in.remove_prefix(prefix.size());
 
-  *is_int_property = false;
   if (in.starts_with("num-files-at-level")) {
     return kNumFilesAtLevel;
   } else if (in == "levelstats") {