[patch] spi/xilinx: signedness issue checking platform_get_irq()

[Mark Brown]

On Wed, Jul 17, 2013 at 03:26:38PM +0300, Dan Carpenter wrote:
> "xspi->irq" is unsigned int so it's never less than zero.  I have added
> a cast.

Why is this better than changing irq to a signed type?
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