Remove typdefs for pointer types in fx_system.h

core/src/fxcrt/fx_basic_bstring_unittest.cpp

Index: core/src/fxcrt/fx_basic_bstring_unittest.cpp
diff --git a/core/src/fxcrt/fx_basic_bstring_unittest.cpp b/core/src/fxcrt/fx_basic_bstring_unittest.cpp
index bcdd33b8b8e67f0d070336c2f7f99b043d2cabf7..9d8f376544f7c756f1645f1ccfa27c699db8d413 100644
--- a/core/src/fxcrt/fx_basic_bstring_unittest.cpp
+++ b/core/src/fxcrt/fx_basic_bstring_unittest.cpp
@@ -278,7 +278,7 @@ TEST(fxcrt, ByteStringCNull) {
   EXPECT_EQ(null_string, assigned_null_string);
 
   CFX_ByteStringC assigned_nullptr_string("initially not NULL");
-  assigned_nullptr_string = (FX_LPCSTR)nullptr;
+  assigned_nullptr_string = (const FX_CHAR*)nullptr;
   EXPECT_EQ(assigned_nullptr_string.GetPtr(), nullptr);
   EXPECT_EQ(assigned_nullptr_string.GetLength(), 0);
   EXPECT_TRUE(assigned_nullptr_string.IsEmpty());