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

src/core/SkDraw.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 835 matching lines @@
     SkDEBUGCODE(this->validate();)
 
     // nothing to draw
     if (fRC->isEmpty()) {
         return;
     }
 
     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);
         tmp.setFillType(SkPath::kWinding_FillType);
         this->drawPath(tmp, paint, NULL, true);
         return;
     }
 
     const SkMatrix& matrix = *fMatrix;
     SkRect          devRect;
@@ skipping 1959 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }