Fix broken stream initialization in some dart2js setups #602

Job	Run time
Compile sqlite3 for windows-latest	8s
Compile sqlite3 for ubuntu-latest	4s
Compile sqlite3 for macos-latest	7s
Analyze on Dart stable	25s
Analyze on Dart stable	17s
Unit tests with Dart stable on ubuntu-latest	2m 28s
Unit tests with Dart dev on ubuntu-latest	1m 59s
Unit tests with Dart stable on windows-latest	1m 32s
Unit tests with Dart dev on windows-latest	1m 33s
Unit tests with Dart stable on macos-latest	45s
Unit tests with Dart dev on macos-latest	50s
integration_test_ios	15m 36s
integration_test_linux	1m 54s
integration_test_macos	0s
	27m 38s

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