handle large conic strokes better

samplecode/SampleQuadStroker.cpp

Index: samplecode/SampleQuadStroker.cpp
diff --git a/samplecode/SampleQuadStroker.cpp b/samplecode/SampleQuadStroker.cpp
index 73373a2c979f415e14e573743c147e65f21b7372..05b6204026bb9a3e18fbd1dac3d936160e1bea78 100644
--- a/samplecode/SampleQuadStroker.cpp
+++ b/samplecode/SampleQuadStroker.cpp
@@ -304,10 +304,10 @@ protected:
 
     void draw_stroke(SkCanvas* canvas, const SkPath& path, SkScalar width, SkScalar scale,
             bool drawText) {
-        SkRect bounds = path.getBounds();
-        if (bounds.isEmpty()) {
+        if (path.isEmpty()) {
             return;
         }
+        SkRect bounds = path.getBounds();
         this->setWHZ(SkScalarCeilToInt(bounds.right()), drawText 
                 ? SkScalarRoundToInt(scale * 3 / 2) : SkScalarRoundToInt(scale),
                 SkScalarRoundToInt(950.0f / scale));