fix misc asserts and checks found by fuzzer

include/effects/SkDashPathEffect.h

 /*
  * 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.
  */
 
 #ifndef SkDashPathEffect_DEFINED
 #define SkDashPathEffect_DEFINED
 
@@ skipping 18 matching lines @@
          10 pixels on
          20 pixels off
          10 pixels on
          20 pixels off
          ...
         A phase of -5, 25, 55, 85, etc. would all result in the same path,
          because the sum of all the intervals is 30.
 
         Note: only affects stroked paths.
     */
-    static SkPathEffect* Create(const SkScalar intervals[], int count, SkScalar phase) {
-        return new SkDashPathEffect(intervals, count, phase);
-    }
-    virtual ~SkDashPathEffect();
+    static SkPathEffect* Create(const SkScalar intervals[], int count, SkScalar phase);
 
     virtual bool filterPath(SkPath* dst, const SkPath& src,
                             SkStrokeRec*, const SkRect*) const override;
 
     virtual bool asPoints(PointData* results, const SkPath& src,
                           const SkStrokeRec&, const SkMatrix&,
                           const SkRect*) const override;
 
     DashType asADash(DashInfo* info) const override;
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDashPathEffect)
 
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     bool exposedInAndroidJavaAPI() const override { return true; }
 #endif
 
 protected:
+    virtual ~SkDashPathEffect();
     SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase);
     void flatten(SkWriteBuffer&) const override;
 
 private:
     SkScalar*   fIntervals;
     int32_t     fCount;
     SkScalar    fPhase;
     // computed from phase
+
     SkScalar    fInitialDashLength;
     int32_t     fInitialDashIndex;
     SkScalar    fIntervalLength;
 
     typedef SkPathEffect INHERITED;
 };
 
 #endif