Fixing bug 2418114. Added a check to make sure the TTS sample string for
a language-country combination is available before trying to use it.
diff --git a/src/com/android/settings/TextToSpeechSettings.java b/src/com/android/settings/TextToSpeechSettings.java
index 838d978..1a97fbf 100644
--- a/src/com/android/settings/TextToSpeechSettings.java
+++ b/src/com/android/settings/TextToSpeechSettings.java
@@ -425,7 +425,9 @@
         // update the demo string
         mDemoStringIndex = mDefaultLocPref.findIndexOfValue(mDefaultLanguage + LOCALE_DELIMITER
                 + mDefaultCountry);
-        mDefaultLocPref.setValueIndex(mDemoStringIndex);
+        if (mDemoStringIndex > -1){
+            mDefaultLocPref.setValueIndex(mDemoStringIndex);
+        }
     }
 
     /**