changed line id calculation in decoder

Author: mk30

decode.js

@@ -22,7 +22,7 @@ module.exports = function (buffers) {
       var plen = varint.decode(buf, offset) //pcount
       offset+=varint.decode.bytes
       sizes.line.types+=plen*2+2
-      sizes.line.ids+=plen*4+4
+      sizes.line.ids+=plen*2+2
       sizes.line.positions+=plen*4+4
       sizes.line.normals+=plen*4+4
     }
@@ -58,7 +58,8 @@ module.exports = function (buffers) {
     },
     area: {
       types: new Float32Array(sizes.area.types),
-      ids: new Float32Array(sizes.area.ids),
+      //ids: new Float32Array(sizes.area.ids),
+      ids: Array(sizes.area.ids.length).fill(0),
       positions: new Float32Array(sizes.area.positions),
       cells: new Uint32Array(sizes.area.cells),
       labels: {}

package.json

@@ -16,7 +16,7 @@
   "license": "MIT",
   "dependencies": {
     "earcut": "^2.2.1",
-    "osm-is-area": "^1.0.0",
+    "osm-is-area": "^1.0.4",
     "polyline-normals": "^2.0.2",
     "split2": "^3.1.1",
     "varint": "^5.0.0",