fix tile build on source error

tangrams · May 15, 2015 · 97542f2 · 97542f2
1 parent 96f30c8
commit 97542f2
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/tile.js b/src/tile.js
@@ -368,7 +368,9 @@ export default class Tile {
             'error',
             'debug'
         ];
-        keep.push(...keys);
+        if (Array.isArray(keys)) {
+            keep.push(...keys);
+        }
 
         // Build the tile subset
         var tile_subset = {};