Fix bug #6248364 Tamil and Denavagari text crash in Google+

- fix initialization of variables

Change-Id: Ibda4e1e6f55f867385eaf9a4c7a754c16815bbf0

Author: Fabrice Di Meglio

core/jni/android/graphics/TextLayoutCache.cpp

@@ -341,6 +341,8 @@ TextLayoutShaper::TextLayoutShaper() : mShaperItemGlyphArraySize(0) {
     mHebrewBoldTypeface = NULL;
     mBengaliTypeface = NULL;
     mThaiTypeface = NULL;
+    mDevanagariTypeface = NULL;
+    mTamilTypeface = NULL;
 
     mFontRec.klass = &harfbuzzSkiaClass;
     mFontRec.userData = 0;
@@ -383,6 +385,8 @@ TextLayoutShaper::~TextLayoutShaper() {
     SkSafeUnref(mHebrewBoldTypeface);
     SkSafeUnref(mBengaliTypeface);
     SkSafeUnref(mThaiTypeface);
+    SkSafeUnref(mDevanagariTypeface);
+    SkSafeUnref(mTamilTypeface);
     deleteShaperItemGlyphArrays();
 }