Make sure getFallbackFamily() always sets *scriptChecked.

Source/platform/fonts/win/FontFallbackWin.cpp

 /*
  * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 386 matching lines @@
 //  - All the characters (or characters up to the point a single
 //    font can cover) need to be taken into account
 const UChar* getFallbackFamily(UChar32 character,
     FontDescription::GenericFamilyType generic,
     UScriptCode* scriptChecked,
     SkFontMgr* fontManager)
 {
     ASSERT(character);
     ASSERT(fontManager);
     const UChar* family = getFontBasedOnUnicodeBlock(character, fontManager);
-    if (family)
+    if (family) {
+        if (scriptChecked)
+            *scriptChecked = USCRIPT_INVALID_CODE;
         return family;
+    }
 
     UScriptCode script = getScript(character);
 
     // For the full-width ASCII characters (U+FF00 - U+FF5E), use the font for
     // Han (determined in a locale-dependent way above). Full-width ASCII
     // characters are rather widely used in Japanese and Chinese documents and
     // they're fully covered by Chinese, Japanese and Korean fonts.
     if (0xFF00 < character && character < 0xFF5F)
         script = USCRIPT_HAN;
 
@@ skipping 26 matching lines @@
             family = L"lucida sans unicode";
         }
     }
 
     if (scriptChecked)
         *scriptChecked = script;
     return family;
 }
 
 } // namespace blink