Fix two truncation bugs in harfbuzz-indic shaper.

third_party/harfbuzz/src/harfbuzz-indic.cpp

 /*
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This is part of HarfBuzz, an OpenType Layout engine library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
@@ skipping 19 matching lines @@
 
 #define FLAG(x) (1 << (x))
 
 static HB_Bool isLetter(HB_UChar16 ucs)
 {
     const int test = FLAG(HB_Letter_Uppercase) |
                      FLAG(HB_Letter_Lowercase) |
                      FLAG(HB_Letter_Titlecase) |
                      FLAG(HB_Letter_Modifier) |
                      FLAG(HB_Letter_Other);
-    return FLAG(HB_GetUnicodeCharCategory(ucs)) & test;
+    return !!(FLAG(HB_GetUnicodeCharCategory(ucs)) & test);
 }
 
 static HB_Bool isMark(HB_UChar16 ucs)
 {
     const int test = FLAG(HB_Mark_NonSpacing) |
                      FLAG(HB_Mark_SpacingCombining) |
                      FLAG(HB_Mark_Enclosing);
-    return FLAG(HB_GetUnicodeCharCategory(ucs)) & test;
+    return !!(FLAG(HB_GetUnicodeCharCategory(ucs)) & test);
 }
 
 enum Form {
     Invalid = 0x0,
     UnknownForm = Invalid,
     Consonant,
     Nukta,
     Halant,
     Matra,
     VowelMark,
@@ skipping 1824 matching lines @@
             ++uc;
             ++i;
         }
         assert(i == boundary);
     }
 
 
 }