Fix a fts3 typo/bug.

third_party/sqlite/fts3.patch

 Index: ext/fts3/fts3.c
 ===================================================================
 --- ext/fts3/fts3.c     (revision 48811)
 +++ ext/fts3/fts3.c     (working copy)
 @@ -271,6 +271,7 @@
  ** deletions and duplications.  This would basically be a forced merge
  ** into a single segment.
  */
 +#define CHROMIUM_FTS3_CHANGES 1
  
@@ skipping 1092 matching lines @@
 @@ -4533,18 +4713,26 @@
    }else{
      int n, nPrefix, nSuffix;
  
 -    n = fts3GetVarint32(pReader->pData, &nPrefix);
 -    n += fts3GetVarint32(pReader->pData+n, &nSuffix);
 +    n = fts3GetVarint32Safe(pReader->pData, &nPrefix, pReader->nData);
 +    if( !n ) return SQLITE_CORRUPT_BKPT;
 +    pReader->nData -= n;
 +    pReader->pData += n;
-+    n += fts3GetVarint32Safe(pReader->pData, &nSuffix, pReader->nData);
++    n = fts3GetVarint32Safe(pReader->pData, &nSuffix, pReader->nData);
 +    if( !n ) return SQLITE_CORRUPT_BKPT;
 +    pReader->nData -= n;
 +    pReader->pData += n;
 +    if( nSuffix<0 || nSuffix>pReader->nData ) return SQLITE_CORRUPT_BKPT;
 +    if( nPrefix<0 || nPrefix>pReader->term.nData ) return SQLITE_CORRUPT_BKPT;
  
      /* Truncate the current term and append suffix data. */
      pReader->term.nData = nPrefix;
 -    dataBufferAppend(&pReader->term, pReader->pData+n, nSuffix);
 +    dataBufferAppend(&pReader->term, pReader->pData, nSuffix);
@@ skipping 793 matching lines @@
 --- ext/fts3/fts3_tokenizer.c   (revision 48811)
 +++ ext/fts3/fts3_tokenizer.c   (working copy)
 @@ -33,6 +33,7 @@
  #include "fts3_hash.h"
  #include "fts3_tokenizer.h"
  #include <assert.h>
 +#include <stddef.h>
  
  /*
  ** Implementation of the SQL scalar function for accessing the underlying