#581 fixing up line coloring

Author: monfera

src/traces/scatter/line_defaults.js

@@ -18,6 +18,9 @@ module.exports = function lineDefaults(traceIn, traceOut, defaultColor, layout,
 
     var markerColor = (traceIn.marker || {}).color;
 
+    //if(traceIn.line) defaultColor = markerColor;
+
+    coerce('line.color', defaultColor);
     if(hasColorscale(traceIn, 'line')) {
         colorscaleDefaults(
             traceIn, traceOut, layout, coerce, {prefix: 'line.', cLetter: 'c'}

test/image/baselines/gl3d_scatter-color-palette-with-default-marker.png

@@ -3,11 +3,13 @@
     "x":[-4,-3,-2,-1,0,1,2,3,4,5,6],
     "y":[7,5,6,4,2,3,1,3,-1,-4,-2],
     "z":[2,3,4,5,4,3,2,1,0,-1,-2],
-    "mode": "lines+markers",
-    "marker": {
-      "size": 5,
+    "mode": "lines",
+    "line": {
+      "width": 10,
       "colorscale": "Viridis",
-      "color": [1,2,3,4,5,6,7,8,9,10]
+      "color": [1,2,3,4,5,6,7,8,9,10],
+      "cmin": 1,
+      "cmax": 10
     },
     "type":"scatter3d"
   }],