Gvas: fix some JSON!MASS fuckery.

To the community: I know VD didn't properly QA it, but please, be
careful with the system!

src/Gvas/Serialisers/StringProperty.cpp

@@ -45,7 +45,17 @@ StringProperty::deserialise(Containers::StringView name, Containers::StringView
         }
     }
 
-    if(!reader.readUEString(prop->value)) {
+    if(value_length == 4) {
+        // MASS files (the JSON-based sharing system VD made) have a bug that allows importing weapons of a type in
+        // another weapon array. It can lead to more serious issues, like weapon names being empty. The code below is an
+        // attempt to work around that particular issue.
+        LOG_WARNING_FORMAT("Property {} has an invalid value size {}. Working around it. Please do an action that leads to a write operation.", name, value_length);
+        value_length++;
+        prop->value = "";
+        std::uint32_t dummy_u32;
+        reader.readUint32(dummy_u32);
+    }
+    else if(!reader.readUEString(prop->value)) {
         LOG_ERROR_FORMAT("Couldn't read string property {}'s value.", name);
         return nullptr;
     }