Use std::vector as internal storage for CPDF_Array

core/fpdfdoc/doc_formcontrol.cpp

Index: core/fpdfdoc/doc_formcontrol.cpp
diff --git a/core/fpdfdoc/doc_formcontrol.cpp b/core/fpdfdoc/doc_formcontrol.cpp
index 6435cfd76c79da34cbea28624519248a191034cf..55f05a599b39b5b32cf734b658435e9923a7904d 100644
--- a/core/fpdfdoc/doc_formcontrol.cpp
+++ b/core/fpdfdoc/doc_formcontrol.cpp
@@ -351,7 +351,7 @@ FX_ARGB CPDF_ApSettings::GetColor(int& iColorType,
     return 0;
 
   FX_ARGB color = 0;
-  uint32_t dwCount = pEntry->GetCount();
+  size_t dwCount = pEntry->GetCount();
   if (dwCount == 1) {
     iColorType = COLORTYPE_GRAY;
     FX_FLOAT g = pEntry->GetNumberAt(0) * 255;
@@ -400,7 +400,7 @@ void CPDF_ApSettings::GetOriginalColor(int& iColorType,
   if (!pEntry) {
     return;
   }
-  uint32_t dwCount = pEntry->GetCount();
+  size_t dwCount = pEntry->GetCount();
   if (dwCount == 1) {
     iColorType = COLORTYPE_GRAY;
     fc[0] = pEntry->GetNumberAt(0);