properly load techs

src/entity/gateway/postgres/models.rs

@@ -242,7 +242,7 @@ impl Into<CharacterEntity> for PgCharacter {
                 prop_y: self.prop_y,
             },
             techs: CharacterTechniques {
-                techs: self.techs.iter().enumerate().take(19).map(|(i, t)| (tech::Technique::from_value(i as u8), TechLevel(*t)) ).collect()
+                techs: self.techs.iter().enumerate().take(19).filter(|(_, t)| **t != 0xFF).map(|(i, t)| (tech::Technique::from_value(i as u8), TechLevel(*t)) ).collect()
             },
             config: CharacterConfig {
                 raw_data: vec_to_array(self.config)