Fix infinite loop caused by parsing same indirect objects

fpdfsdk/src/fpdfview_embeddertest.cpp

Index: fpdfsdk/src/fpdfview_embeddertest.cpp
diff --git a/fpdfsdk/src/fpdfview_embeddertest.cpp b/fpdfsdk/src/fpdfview_embeddertest.cpp
index 6eb5fb95cdbc25f2a9aebe5f480af1718cab0c42..6a6d0769830f2633796b14d405c720f9f3385f70 100644
--- a/fpdfsdk/src/fpdfview_embeddertest.cpp
+++ b/fpdfsdk/src/fpdfview_embeddertest.cpp
@@ -216,3 +216,9 @@ TEST_F(FPDFViewEmbeddertest, Hang_298) {
 TEST_F(FPDFViewEmbeddertest, CrossRefV4Loop) {
   EXPECT_TRUE(OpenDocument("bug_xrefv4_loop.pdf"));
 }
+
+// The test should pass when circular references to ParseIndirectObject will not
+// cause infinite loop.
+TEST_F(FPDFViewEmbeddertest, Hang_343) {
+  EXPECT_FALSE(OpenDocument("bug_343.pdf"));
+}