don't square error term twice

src/core/SkStroke.cpp

 /*
  * Copyright 2008 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 "SkStrokerPriv.h"
 #include "SkGeometry.h"
 #include "SkPath.h"
@@ skipping 1021 matching lines @@
 
 bool SkPathStroker::cubicStroke(const SkPoint cubic[4], SkQuadConstruct* quadPts) {
     if (!fFoundTangents) {
         ResultType resultType = this->tangentsMeet(cubic, quadPts);
         if (kQuad_ResultType != resultType) {
             if (kNormalError_ResultType == resultType) {
                 return false;
             }
             if ((kDegenerate_ResultType == resultType
                     || points_within_dist(quadPts->fQuad[0], quadPts->fQuad[2],
-                    fInvResScaleSquared)) && cubicMidOnLine(cubic, quadPts)) {
+                    fInvResScale)) && cubicMidOnLine(cubic, quadPts)) {
                 addDegenerateLine(quadPts);
                 return true;
             }
         } else {
             fFoundTangents = true;
         }
     }
     if (fFoundTangents) {
         ResultType resultType = this->compareQuadCubic(cubic, quadPts);
         if (kQuad_ResultType == resultType) {
@@ skipping 397 matching lines @@
         default:
             break;
     }
 
     if (fWidth < SkMinScalar(rw, rh) && !fDoFill) {
         r = rect;
         r.inset(radius, radius);
         dst->addRect(r, reverse_direction(dir));
     }
 }