Fix a crash in SkParsePath::FromSVGString

tests/ParsePathTest.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 "SkParsePath.h"
 #include "Test.h"
 
@@ skipping 45 matching lines @@
     SkRect r;
     r.set(0, 0, 10, 10.5f);
     SkPath p;
     p.addRect(r);
     test_to_from(reporter, p);
     p.addOval(r);
     test_to_from(reporter, p);
     p.addRoundRect(r, 4, 4.5f);
     test_to_from(reporter, p);
 }
+
+DEF_TEST(ParsePath_invalid, r) {
+    SkPath path;
+    // This is an invalid SVG string, but the test verifies that we do not
+    // crash.
+    bool success = SkParsePath::FromSVGString("M 5", &path);
+    REPORTER_ASSERT(r, !success);
+}