fix fuzz test that exceeds numeric limit

src/pathops/SkPathOpsTSect.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPathOpsTSect_DEFINED
 #define SkPathOpsTSect_DEFINED
 
 #include "SkChunkAlloc.h"
@@ skipping 409 matching lines @@
     }
     this->validate();
 #if DEBUG_T_SECT
     span->validatePerpT(t);
 #endif
 }
 
 template<typename TCurve, typename OppCurve>
 double SkTSpan<TCurve, OppCurve>::closestBoundedT(const SkDPoint& pt) const {
     double result = -1;
-    double closest = FLT_MAX;
+    double closest = DBL_MAX;
     const SkTSpanBounded<OppCurve, TCurve>* testBounded = fBounded;
     while (testBounded) {
         const SkTSpan<OppCurve, TCurve>* test = testBounded->fBounded;
         double startDist = test->fPart[0].distanceSquared(pt);
         if (closest > startDist) {
             closest = startDist;
             result = test->fStartT;
         }
         double endDist = test->fPart[OppCurve::kPointLast].distanceSquared(pt);
         if (closest > endDist) {
@@ skipping 1797 matching lines @@
             --last;
         } else {
             intersections->setCoincident(index++);
         }
         intersections->setCoincident(index);
     }
     SkASSERT(intersections->used() <= TCurve::kMaxIntersections);
 }
 
 #endif