Merge to XFA: Fix integer and bounds issues in sycc4{22,44}_to_rgb.

core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp

Index: core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
index 1633249d0d33e09ddbbf923e7a8015f39f347788..427abb8e37179a13f9b367540342561babadbedd 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
@@ -17,3 +17,13 @@ TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_554151) {
   FPDFBitmap_Destroy(bitmap);
   UnloadPage(page);
 }
+
+TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_557223) {
+  // Should not crash
+  EXPECT_TRUE(OpenDocument("bug_557223.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_NE(nullptr, page);
+  FPDF_BITMAP bitmap = RenderPage(page);
+  FPDFBitmap_Destroy(bitmap);
+  UnloadPage(page);
+}