GameList: Flush game list after re-scanning

Should hopefully fix random gamelist corruption.

src/core/game_list.cpp

@@ -497,6 +497,14 @@ bool GameList::WriteEntryToCache(const GameListEntry* entry, ByteStream* stream)
   return result;
 }
 
+void GameList::FlushCacheFileStream()
+{
+  if (!m_cache_write_stream)
+    return;
+
+  m_cache_write_stream->Flush();
+}
+
 void GameList::CloseCacheFileStream()
 {
   if (!m_cache_write_stream)
@@ -588,6 +596,8 @@ void GameList::ScanDirectory(const char* path, bool recursive, ProgressCallback*
     entry = {};
   }
 
+  FlushCacheFileStream();
+
   progress->SetProgressValue(static_cast<u32>(files.size()));
   progress->PopState();
 }

src/core/game_list.h

@@ -107,6 +107,7 @@ private:
   bool LoadEntriesFromCache(ByteStream* stream);
   bool OpenCacheForWriting();
   bool WriteEntryToCache(const GameListEntry* entry, ByteStream* stream);
+  void FlushCacheFileStream();
   void CloseCacheFileStream();
   void DeleteCacheFile();