Sign mismatches in QML language server

 const auto smallestColon = smallest->fileLocation->info().regions[ColonTokenRegion];
// sanity check: is it the definition of the current binding? check if they both have their
// ':' at the same location
if (propertyDefinitionColon.isValid() && propertyDefinitionColon == smallestColon
    && offsetInFile < smallestColon.offset) {
    return smallestPropertyDefinition;
}