fix non-constant format string calls to XXXfwq

Author: ARolek

cache/cache.go

@@ -75,7 +75,7 @@ func ParseKey(str string) (*Key, error) {
 			val:  zxy[0],
 		}
 
-		log.Printf(err.Error())
+		log.Printf("cache: invalid file key: %s", err.Error())
 		return nil, err
 	}
 
@@ -90,7 +90,7 @@ func ParseKey(str string) (*Key, error) {
 			val:  zxy[1],
 		}
 
-		log.Printf(err.Error())
+		log.Printf("cache: invalid file key: %s", err.Error())
 		return nil, err
 	}
 
@@ -106,7 +106,7 @@ func ParseKey(str string) (*Key, error) {
 			val:  zxy[2],
 		}
 
-		log.Printf(err.Error())
+		log.Printf("cache: invalid file key: %s", err.Error())
 		return nil, err
 	}
 	key.Y = uint(placeholder)

server/handle_map_layer_zxy.go

@@ -123,7 +123,7 @@ func (req HandleMapLayerZXY) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	m, err := req.Atlas.Map(req.mapName)
 	if err != nil {
 		errMsg := fmt.Sprintf("map (%v) not configured. check your config file", req.mapName)
-		log.Errorf(errMsg)
+		log.Error(errMsg)
 		http.Error(w, errMsg, http.StatusNotFound)
 		return
 	}