altos: Declare task stack as union of uint8_t and uint32_t
authorKeith Packard <keithp@keithp.com>
Tue, 5 Feb 2019 06:38:23 +0000 (22:38 -0800)
committerKeith Packard <keithp@keithp.com>
Mon, 18 Feb 2019 21:08:23 +0000 (13:08 -0800)
Support -Wcast-align and -Wpointer-arith while still allowing
architectures to pick whether they want an 8-bit or 32-bit stack.

Signed-off-by: Keith Packard <keithp@keithp.com>

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