Fix FPDF_GetPageLabel API typo.

fpdfsdk/fpdfdoc.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "public/fpdf_doc.h"
 
 #include <memory>
 #include <set>
@@ skipping 378 matching lines @@
   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
   if (!pDoc)
     return 0;
   CPDF_Dictionary* pInfo = pDoc->GetInfo();
   if (!pInfo)
     return 0;
   CFX_WideString text = pInfo->GetUnicodeTextFor(tag);
   return Utf16EncodeMaybeCopyAndReturnLength(text, buffer, buflen);
 }
 
-DLLEXPORT unsigned long STDCALL FPDF_GetPagelLabel(FPDF_DOCUMENT document,
-                                                   int page_index,
-                                                   void* buffer,
-                                                   unsigned long buflen) {
+DLLEXPORT unsigned long STDCALL FPDF_GetPageLabel(FPDF_DOCUMENT document,
+                                                  int page_index,
+                                                  void* buffer,
+                                                  unsigned long buflen) {
   if (page_index < 0)
     return 0;
 
   // CPDF_PageLabel can deal with NULL |document|.
   CPDF_PageLabel label(CPDFDocumentFromFPDFDocument(document));
   CFX_WideString str;
   if (!label.GetLabel(page_index, &str))
     return 0;
   return Utf16EncodeMaybeCopyAndReturnLength(str, buffer, buflen);
 }