[dart_runner] Allow exit codes from main()
The exit code from fuchsia.exit(value) was being overidden.
Also, initialize has_set_return_code in DartState.
TEST: Wrote a test that runs goodbye_dart in two modes and checks the
results. Tested the test by changing the return code :)
US-510 #done
Change-Id: I4af2f7927dc0a8e0c784c4eb1377367f3156f498
diff --git a/dart_state.cc b/dart_state.cc
index 886a16f..e02d225 100644
--- a/dart_state.cc
+++ b/dart_state.cc
@@ -22,6 +22,7 @@
message_handler_(new DartMessageHandler()),
file_loader_(new FileLoader(dirfd)),
message_epilogue_(message_epilogue),
+ has_set_return_code_(false),
weak_factory_(this) {}
DartState::~DartState() {}