fix: When binding an array of events, don't duplicate

When we bind events from a feature to a parent layer, we were calling
the geoOn or geoOff event on both the feature and layer.  For arrays of
events, this ended calling the layer with both the array of events and
each event.

src/pixelmapLayer.js

@@ -120,7 +120,9 @@ var pixelmapLayer = function (arg) {
     ['modified', 'geoOn', 'geoOff', 'geoOnce'].forEach((funcName) => {
       const superFunc = m_this[funcName];
       m_this[funcName] = function () {
-        m_pixelmapFeature[funcName].apply(this, arguments);
+        if (!Array.isArray(arguments[0])) {
+          m_pixelmapFeature[funcName].apply(this, arguments);
+        }
         return superFunc.apply(this, arguments);
       };
     });

tests/gl-cases/pixelmapLayer.js

@@ -89,6 +89,25 @@ describe('webglPixelmapLayer', function () {
       done();
     });
   });
+  it('geoOn and geoOff from array', function (done) {
+    createPixelmap();
+    var click = 0;
+    layer.geoOn([geo.event.feature.mouseclick], () => {
+      click += 1;
+    });
+    // wait for the tiles to be available
+    map.onIdle(() => {
+      expect(click).toEqual(0);
+      map.interactor().simulateEvent('mousedown', {map: {x: 390, y: 200}});
+      map.interactor().simulateEvent('mouseup', {map: {x: 390, y: 200}});
+      expect(click).toEqual(1);
+      layer.geoOff([geo.event.feature.mouseclick]);
+      map.interactor().simulateEvent('mousedown', {map: {x: 390, y: 200}});
+      map.interactor().simulateEvent('mouseup', {map: {x: 390, y: 200}});
+      expect(click).toEqual(1);
+      done();
+    });
+  });
   it('geospatial', function (done) {
     map = geo.map({node: '#map'});
     layer = map.createLayer('pixelmap', {