Fix array-out-of-bounds error in hunspell

src/hunspell/hunspell.cxx

 #include "license.hunspell"
 #include "license.myspell"
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "hunspell.hxx"
 #include "hunspell.h"
 #ifndef HUNSPELL_CHROME_CLIENT
@@ skipping 119 matching lines @@
        *p = '\0';
        return 0;
    }
 
    strncpy(dest, (char *) q, nl);
    *(dest + nl) = '\0';
    nl = strlen(dest);
    if (utf8) {
       *nc = u8_u16(dest_utf, MAXWORDLEN, dest);
       // don't check too long words
-      if (*nc >= MAXWORDLEN) return 0;
+      // TODO(rouslan): Remove the interim change below when this patch lands:
+      // http://sf.net/tracker/?func=detail&aid=3595024&group_id=143754&atid=756395.
+      if (*nc >= MAXWORDLEN - 1) return 0;
       if (*nc == -1) { // big Unicode character (non BMP area)
          *pcaptype = NOCAP;
          return nl;
       }
      *pcaptype = get_captype_utf8(dest_utf, *nc, langnum);
    } else {
      *pcaptype = get_captype(dest, nl, csconv);
      *nc = nl;
    }
    return nl;
@@ skipping 1896 matching lines @@
 
   /* remove word from the run-time dictionary */
 
 int Hunspell_remove(Hunhandle *pHunspell, const char * word) {
         return ((Hunspell*)pHunspell)->remove(word);
 }
 
 void Hunspell_free_list(Hunhandle *, char *** slst, int n) {
         freelist(slst, n);
 }