Add missing FPDF_CALLCONV for "is active" page object functions

Functions FPDFPageObj_GetIsActive and FPDFPageObj_SetIsActive have been
missing FPDF_CALLCONV in the implementation.  Add those to be like other
public API calls.

Fixed: 396434701
Change-Id: Ia8f67078c44c5257e3b510b4987f4a85dd13fc7b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/129030
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

fpdfsdk/fpdf_editpage.cpp

diff --git a/fpdfsdk/fpdf_editpage.cpp b/fpdfsdk/fpdf_editpage.cpp
index 1d6dee3..223f899 100644
--- a/fpdfsdk/fpdf_editpage.cpp
+++ b/fpdfsdk/fpdf_editpage.cpp
@@ -630,8 +630,8 @@
                   : FPDF_PAGEOBJ_UNKNOWN;
 }
 
-FPDF_EXPORT FPDF_BOOL FPDFPageObj_GetIsActive(FPDF_PAGEOBJECT page_object,
-                                              FPDF_BOOL* active) {
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FPDFPageObj_GetIsActive(FPDF_PAGEOBJECT page_object, FPDF_BOOL* active) {
   if (!active) {
     return false;
   }
@@ -645,8 +645,8 @@
   return true;
 }
 
-FPDF_EXPORT FPDF_BOOL FPDFPageObj_SetIsActive(FPDF_PAGEOBJECT page_object,
-                                              FPDF_BOOL active) {
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FPDFPageObj_SetIsActive(FPDF_PAGEOBJECT page_object, FPDF_BOOL active) {
   CPDF_PageObject* cpage_object = CPDFPageObjectFromFPDFPageObject(page_object);
   if (!cpage_object) {
     return false;