Fix maybe unintialized warning for GrAutoLocaleSetter

src/gpu/GrAutoLocaleSetter.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAutoLocaleSetter_DEFINED
 #define GrAutoLocaleSetter_DEFINED
 
 #include "GrTypes.h"
 
 #if !defined(SK_BUILD_FOR_ANDROID)
 #include <locale.h>
 #endif
 
 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
 #include <xlocale.h>
 #endif
 
 /**
  * Helper class for ensuring that we don't use the wrong locale when building shaders. Android
  * doesn't support locale in the NDK, so this is a no-op there.
  */
-class GrAutoLocaleSetter {
+class GrAutoLocaleSetter : public SkNoncopyable {
 public:
     GrAutoLocaleSetter (const char* name) {
 #if defined(SK_BUILD_FOR_WIN)
         fOldPerThreadLocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
         fOldLocale = setlocale(LC_ALL, name);
 #elif !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__)
         fLocale = newlocale(LC_ALL, name, 0);
         if (fLocale) {
             fOldLocale = uselocale(fLocale);
+        } else {
+            fOldLocale = static_cast<locale_t>(0);
         }
 #else
         (void) name; // suppress unused param warning.
 #endif
     }
 
     ~GrAutoLocaleSetter () {
 #if defined(SK_BUILD_FOR_WIN)
         setlocale(LC_ALL, fOldLocale);
         _configthreadlocale(fOldPerThreadLocale);
@@ skipping 10 matching lines @@
     int fOldPerThreadLocale;
     const char* fOldLocale;
 #elif !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__)
     locale_t fOldLocale;
     locale_t fLocale;
 #endif
 };
 
 #endif