Fix invalid pointer in stack when stack grows

[mxmauro]

Hi,

Starting from Go 1.14.x (if I'm right), unsafe and dll calls changed a bit in the way pointers should be passed.

To reproduce the issue launch a go routine from main and try to output a colorized text.

This is a Windows specific bug.

Regards,
Mauro.

[coveralls]

Pull Request Test Coverage Report for Build 113

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.583%

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Totals
Change from base Build 112:	0.0%
Covered Lines:	779
Relevant Lines:	815

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