Fix unique ptrs in fpdfppo.cpp

fpdfsdk/fpdfppo_embeddertest.cpp

Index: fpdfsdk/fpdfppo_embeddertest.cpp
diff --git a/fpdfsdk/fpdfppo_embeddertest.cpp b/fpdfsdk/fpdfppo_embeddertest.cpp
index 3149f072f5741bce0ae29fdec5e0acfa54c08ba0..097231653419d8ebad9537374e8ffbe41113dd1e 100644
--- a/fpdfsdk/fpdfppo_embeddertest.cpp
+++ b/fpdfsdk/fpdfppo_embeddertest.cpp
@@ -90,3 +90,17 @@ TEST_F(FPDFPPOEmbeddertest, GoodRanges) {
 
   UnloadPage(page);
 }
+
+TEST_F(FPDFPPOEmbeddertest, BUG_664284) {
+  EXPECT_TRUE(OpenDocument("bug_664284.pdf"));
+
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_TRUE(page);
+
+  FPDF_DOCUMENT output_doc = FPDF_CreateNewDocument();
+  EXPECT_TRUE(output_doc);
+  EXPECT_TRUE(FPDF_ImportPages(output_doc, document(), "1", 0));
+  FPDF_CloseDocument(output_doc);
+
+  UnloadPage(page);
+}