Fix empty legacy meta being persisted

diff --git a/src/itemstackmetadata.cpp b/src/itemstackmetadata.cpp
index 02c548abb6ae88b18519eec027f480381f385f0d..f63671425d390222397a35df81aa0a0dbbe68b10 100644 (file)
--- a/src/itemstackmetadata.cpp
+++ b/src/itemstackmetadata.cpp
@@ -14,8 +14,9 @@ void ItemStackMetadata::serialize(std::ostream &os) const
        std::ostringstream os2;
        os2 << DESERIALIZE_START;
        for (const auto &stringvar : m_stringvars) {
-               os2 << stringvar.first << DESERIALIZE_KV_DELIM
-                   << stringvar.second << DESERIALIZE_PAIR_DELIM;
+               if (!stringvar.first.empty() || !stringvar.second.empty())
+                       os2 << stringvar.first << DESERIALIZE_KV_DELIM
+                               << stringvar.second << DESERIALIZE_PAIR_DELIM;
        }
        os << serializeJsonStringIfNeeded(os2.str());
 }