Fix maybe unintialized warning for GrAutoLocaleSetter

src/gpu/GrAutoLocaleSetter.h

Index: src/gpu/GrAutoLocaleSetter.h
diff --git a/src/gpu/GrAutoLocaleSetter.h b/src/gpu/GrAutoLocaleSetter.h
index 3aa50c9d4d65c8bd59839222025d716bc898c769..bcb23cfb29fd8345cdd8d8239f5d467de437b437 100644
--- a/src/gpu/GrAutoLocaleSetter.h
+++ b/src/gpu/GrAutoLocaleSetter.h
@@ -22,7 +22,7 @@
  * 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)
@@ -32,6 +32,8 @@ public:
         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.