Fix a leak with FPDFPageObj_NewImgeObj().

core/fpdfapi/fpdf_page/cpdf_imageobject.cpp

Index: core/fpdfapi/fpdf_page/cpdf_imageobject.cpp
diff --git a/core/fpdfapi/fpdf_page/cpdf_imageobject.cpp b/core/fpdfapi/fpdf_page/cpdf_imageobject.cpp
index e2defa80544be13b50a30babfe498ed7edae4a4e..70e5d8e6ba35da1fa2ebd424d982a5a4bab0708d 100644
--- a/core/fpdfapi/fpdf_page/cpdf_imageobject.cpp
+++ b/core/fpdfapi/fpdf_page/cpdf_imageobject.cpp
@@ -13,15 +13,22 @@
 CPDF_ImageObject::CPDF_ImageObject() : m_pImage(nullptr) {}
 
 CPDF_ImageObject::~CPDF_ImageObject() {
-  if (!m_pImage) {
+  if (!m_pImage)
+    return;
+
+  if (m_pImage->CanRelease()) {
+    m_pImage->Release();
     return;
   }
-  if (m_pImage->IsInline() ||
-      (m_pImage->GetStream() && m_pImage->GetStream()->GetObjNum() == 0)) {
-    delete m_pImage;
-  } else {
-    m_pImage->GetDocument()->GetPageData()->ReleaseImage(m_pImage->GetStream());
+
+  CPDF_DocPageData* pPageData = m_pImage->GetDocument()->GetPageData();
+  const CPDF_Object* pImageStream = m_pImage->GetStream();
+  if (pPageData->HasImage(pImageStream)) {
+    pPageData->ReleaseImage(pImageStream);
+    return;
   }
+
+  delete m_pImage;
 }
 
 CPDF_ImageObject* CPDF_ImageObject::Clone() const {