Do not call blitV with 0 height

tests/PathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <cmath>
 #include "SkCanvas.h"
 #include "SkGeometry.h"
@@ skipping 4226 matching lines @@
                  SkBits2Float(0x423fcdcd), SkBits2Float(0x40ed9341));
 //  AKA: cubicTo(-4.31596e+08f, -4.31602e+08f, -4.31602e+08f, -4.31602e+08f, 47.951f, 7.42423f);
     path.lineTo(0, 0);
 
     auto surface = SkSurface::MakeRasterN32Premul(100, 100);
     SkPaint paint;
     paint.setAntiAlias(true);
     surface->getCanvas()->drawPath(path, paint);
 }
 
+static void test_fuzz_crbug_662952(skiatest::Reporter* reporter) {
+    SkPath path;
+    path.moveTo(SkBits2Float(0x4109999a), SkBits2Float(0x411c0000));  // 8.6f, 9.75f
+    path.lineTo(SkBits2Float(0x410a6666), SkBits2Float(0x411c0000));  // 8.65f, 9.75f
+    path.lineTo(SkBits2Float(0x410a6666), SkBits2Float(0x411e6666));  // 8.65f, 9.9f
+    path.lineTo(SkBits2Float(0x4109999a), SkBits2Float(0x411e6666));  // 8.6f, 9.9f
+    path.lineTo(SkBits2Float(0x4109999a), SkBits2Float(0x411c0000));  // 8.6f, 9.75f
+    path.close();
+
+    auto surface = SkSurface::MakeRasterN32Premul(100, 100);
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    surface->getCanvas()->clipPath(path, true);
+    surface->getCanvas()->drawRectCoords(0, 0, 100, 100, paint);
+}
+
 static void test_interp(skiatest::Reporter* reporter) {
     SkPath p1, p2, out;
     REPORTER_ASSERT(reporter, p1.isInterpolatable(p2));
     REPORTER_ASSERT(reporter, p1.interpolate(p2, 0, &out));
     REPORTER_ASSERT(reporter, p1 == out);
     REPORTER_ASSERT(reporter, p1.interpolate(p2, 1, &out));
     REPORTER_ASSERT(reporter, p1 == out);
     p1.moveTo(0, 2);
     p1.lineTo(0, 4);
     REPORTER_ASSERT(reporter, !p1.isInterpolatable(p2));
@@ skipping 34 matching lines @@
     test_contains(reporter);
 }
 
 DEF_TEST(Paths, reporter) {
     test_fuzz_crbug_647922();
     test_fuzz_crbug_643933();
     test_sect_with_horizontal_needs_pinning();
     test_crbug_629455(reporter);
     test_fuzz_crbug_627414(reporter);
     test_path_crbug364224();
+    test_fuzz_crbug_662952(reporter);
 
     SkTSize<SkScalar>::Make(3,4);
 
     SkPath  p, empty;
     SkRect  bounds, bounds2;
     test_empty(reporter, p);
 
     REPORTER_ASSERT(reporter, p.getBounds().isEmpty());
 
     // this triggers a code path in SkPath::operator= which is otherwise unexercised
@@ skipping 135 matching lines @@
     PathRefTest_Private::TestPathRef(reporter);
     PathTest_Private::TestPathrefListeners(reporter);
     test_dump(reporter);
     test_path_crbug389050(reporter);
     test_path_crbugskia2820(reporter);
     test_skbug_3469(reporter);
     test_skbug_3239(reporter);
     test_bounds_crbug_513799(reporter);
     test_fuzz_crbug_638223();
 }