fix misc asserts and checks found by fuzzer

include/effects/Sk1DPathEffect.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 Sk1DPathEffect_DEFINED
 #define Sk1DPathEffect_DEFINED
 
@@ skipping 28 matching lines @@
     typedef SkPathEffect INHERITED;
 };
 
 class SK_API SkPath1DPathEffect : public Sk1DPathEffect {
 public:
     enum Style {
         kTranslate_Style,   // translate the shape to each position
         kRotate_Style,      // rotate the shape about its center
         kMorph_Style,       // transform each point, and turn lines into curves
 
-        kStyleCount
+        kLastEnum_Style = kMorph_Style,
     };
 
     /** Dash by replicating the specified path.
         @param path The path to replicate (dash)
         @param advance The space between instances of path
         @param phase distance (mod advance) along path for its initial position
         @param style how to transform path at each point (based on the current
                      position and tangent)
     */
-    static SkPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase, Style style) {
-        return new SkPath1DPathEffect(path, advance, phase, style);
-    }
+    static SkPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase, Style);
 
     virtual bool filterPath(SkPath*, const SkPath&,
                             SkStrokeRec*, const SkRect*) const override;
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect)
 
 protected:
     SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
     void flatten(SkWriteBuffer&) const override;
 
     // overrides from Sk1DPathEffect
     SkScalar begin(SkScalar contourLength) const override;
     SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const override;
 
 private:
     SkPath      fPath;          // copied from constructor
     SkScalar    fAdvance;       // copied from constructor
     SkScalar    fInitialOffset; // computed from phase
     Style       fStyle;         // copied from constructor
 
     typedef Sk1DPathEffect INHERITED;
 };
 
 #endif