Change return of FPDFDest_GetDestPageIndex to int.

Bug: pdfium:938
Change-Id: Ic530788313157ce2513f91217705401da7a05ef8
Reviewed-on: https://pdfium-review.googlesource.com/25030
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
diff --git a/fpdfsdk/fpdfdoc.cpp b/fpdfsdk/fpdfdoc.cpp
index 4b51d63..e5edc29 100644
--- a/fpdfsdk/fpdfdoc.cpp
+++ b/fpdfsdk/fpdfdoc.cpp
@@ -212,8 +212,8 @@
   return dest.GetPageIndexDeprecated(pDoc);
 }
 
-FPDF_EXPORT long FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
-                                                         FPDF_DEST pDest) {
+FPDF_EXPORT int FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
+                                                        FPDF_DEST pDest) {
   if (!pDest)
     return -1;
 
diff --git a/public/fpdf_doc.h b/public/fpdf_doc.h
index 7ec232c..b0a1f3b 100644
--- a/public/fpdf_doc.h
+++ b/public/fpdf_doc.h
@@ -196,8 +196,8 @@
 //   dest     - handle to the destination.
 //
 // Returns the -based page index containing |dest|. Returns -1 on error.
-FPDF_EXPORT long FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
-                                                         FPDF_DEST dest);
+FPDF_EXPORT int FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
+                                                        FPDF_DEST dest);
 
 // Get the view (fit type) specified by |dest|.
 // Experimental API. Subject to change.