handle typed arrays for polar

Author: archmoj

src/traces/scatterpolar/defaults.js

@@ -70,6 +70,14 @@ function supplyDefaults(traceIn, traceOut, defaultColor, layout) {
 function handleRThetaDefaults(traceIn, traceOut, layout, coerce) {
     var r = coerce('r');
     var theta = coerce('theta');
+
+    if(Lib.isTypedArray(r)) {
+        traceOut.r = r = Array.from(r);
+    }
+    if(Lib.isTypedArray(theta)) {
+        traceOut.theta = theta = Array.from(theta);
+    }
+
     var len;
 
     if(r) {