[lldb-vscod] fix build with NDEBUG on windows

Summary: _setmode in assert will not run when build with NDEBUG

Reviewers: mstorsjo, labath, amccarth

Reviewed By: labath

Subscribers: lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D69612

Author: SquallATF

lldb/tools/lldb-vscode/VSCode.cpp

@@ -44,8 +44,10 @@ VSCode::VSCode()
 // Windows opens stdout and stdin in text mode which converts \n to 13,10
 // while the value is just 10 on Darwin/Linux. Setting the file mode to binary
 // fixes this.
-  assert(_setmode(fileno(stdout), _O_BINARY));
-  assert(_setmode(fileno(stdin), _O_BINARY));
+  int result = _setmode(fileno(stdout), _O_BINARY);
+  assert(result);
+  result = _setmode(fileno(stdin), _O_BINARY);
+  assert(result);
 #endif
   if (log_file_path)
     log.reset(new std::ofstream(log_file_path));
@@ -301,4 +303,3 @@ void VSCode::RunExitCommands() {
 }
 
 } // namespace lldb_vscode
-