avoid AntiFrameRect when strokeSize is too small. Workaround for skbug/1368

src/core/SkDraw.cpp

Index: src/core/SkDraw.cpp
diff --git a/src/core/SkDraw.cpp b/src/core/SkDraw.cpp
index 1cfeaa34d69e604529b0a5e703a00bc883a37e92..fa572f743487e076e68a933cd35b2708b1c7f51b 100644
--- a/src/core/SkDraw.cpp
+++ b/src/core/SkDraw.cpp
@@ -853,6 +853,11 @@ void SkDraw::drawRect(const SkRect& rect, const SkPaint& paint) const {
     SkPoint strokeSize;
     RectType rtype = ComputeRectType(paint, *fMatrix, &strokeSize);
 
+    // work-around bug in antiframerect when strokesize is < 1
+    if (strokeSize.fX < SK_Scalar1 || strokeSize.fY < SK_Scalar1) {
+        rtype = kPath_RectType;
+    }
+
     if (kPath_RectType == rtype) {
         SkPath  tmp;
         tmp.addRect(rect);