Fix memory allocation for data buffer (#2940)

Removed null terminator allocation for memory data.

gframe/data_manager.cpp

@@ -89,10 +89,9 @@ bool DataManager::LoadDB(const wchar_t* wfile) {
 	spmembuffer_t* mem = (spmembuffer_t*)std::calloc(sizeof(spmembuffer_t), 1);
 	spmemvfs_env_init();
 	mem->total = mem->used = reader->getSize();
-	mem->data = (char*)std::malloc(mem->total + 1);
+	mem->data = (char*)std::malloc(mem->total);
 	reader->read(mem->data, mem->total);
 	reader->drop();
-	(mem->data)[mem->total] = '\0';
 	bool ret{};
 	if (spmemvfs_open_db(&db, file, mem) != SQLITE_OK)
 		ret = Error(db.handle);