fix legend items of marker.colorscale traces

... that don't use calcdata.mcc (that is: gl3d).

Author: etpinard

src/lib/index.js

@@ -644,7 +644,13 @@ lib.minExtend = function(obj1, obj2) {
         v = obj1[k];
         if(k.charAt(0) === '_' || typeof v === 'function') continue;
         else if(k === 'module') objOut[k] = v;
-        else if(Array.isArray(v)) objOut[k] = v.slice(0, arrayLen);
+        else if(Array.isArray(v)) {
+            if(k === 'colorscale') {
+                objOut[k] = v.slice();
+            } else {
+                objOut[k] = v.slice(0, arrayLen);
+            }
+        }
         else if(v && (typeof v === 'object')) objOut[k] = lib.minExtend(obj1[k], obj2[k]);
         else objOut[k] = v;
     }