EMCC compatibility fixes. #225

Job	Run time
Compile / Installs platform (4) / Platform	9s
Compile / Installs platform (5) / Platform	28s
Compile / Installs platform (4) / Clean-up	0s
Compile / Installs platform (5) / Clean-up	0s
Compile / Compile (4)	22s
Compile / Compile (5)	37s
Compile / Clean-up	0s
Test (Indicator.test, 5)	3m 54s
Test (IndicatorBase.test, 5)	3m 29s
Test (IndicatorCandle.test, 5)	3m 57s
Test (IndicatorData.test, 5)	3m 17s
Test (IndicatorTf.test, 5)	3m 2s
Test (IndicatorTick.test, 5)	3m 10s
Test (IndicatorRenko.test, 5)	3m 50s
Clean-up / Clean-up	2s
	26m 17s

Provide feedback