Update safe numerics package to get bitwise ops

core/fxcrt/fx_extension.cpp

Index: core/fxcrt/fx_extension.cpp
diff --git a/core/fxcrt/fx_extension.cpp b/core/fxcrt/fx_extension.cpp
index f1e2583b40ea44c60a9d5f1781227b47d9fe1a13..5b577f745cab4554fde38529c19985a3d7628fe6 100644
--- a/core/fxcrt/fx_extension.cpp
+++ b/core/fxcrt/fx_extension.cpp
@@ -204,7 +204,7 @@ FX_FILESIZE CFX_MemoryStream::GetPosition() {
 bool CFX_MemoryStream::ReadBlock(void* buffer,
                                  FX_FILESIZE offset,
                                  size_t size) {
-  if (!buffer || !size)
+  if (!buffer || !size || offset < 0)
     return false;
 
   FX_SAFE_SIZE_T newPos = size;