sankey: only stash initial view params if trace type is sankey

Author: antoinerg

src/traces/sankey/plot.js

@@ -128,7 +128,8 @@ module.exports = function plot(gd, calcData) {
     var size = fullLayout._size;
 
     // stash initial view
-    for(var i = 0; i < calcData.length; i++) {
+    for(var i = 0; i < gd._fullData.length; i++) {
+        if(gd._fullData[i].type !== cn.sankey) continue;
         if(!gd._fullData[i]._viewInitial) {
             var node = gd._fullData[i].node;
             gd._fullData[i]._viewInitial = {

test/jasmine/tests/sankey_test.js

@@ -610,6 +610,18 @@ describe('sankey tests', function() {
             .then(done);
         });
 
+        it('works as a subplot in the presence of other trace types', function(done) {
+            var mockCopy = Lib.extendDeep({}, require('@mocks/sankey_subplots_circular'));
+
+            mockCopy.data[0] = {
+                y: [5, 1, 4, 3, 2]
+            };
+
+            Plotly.plot(gd, mockCopy)
+            .catch(failTest)
+            .then(done);
+        });
+
         ['0', '1'].forEach(function(finalUIRevision) {
             it('on Plotly.react, it preserves the groups depending on layout.uirevision', function(done) {
                 var uirevisions = ['0', finalUIRevision];