[PATCH] Fix warnings from generic _FPU_GETCW

[David Miller]

From: Chris Metcalf <cmetcalf@tilera.com>
Date: Wed,  5 Dec 2012 14:00:13 -0500

> 2012-12-05  Chris Metcalf  <cmetcalf@tilera.com>
> 
> 	* sysdeps/generic/fpu_control.h (_FPU_GETCW): Define to set cw to
> 	0, not just to plain "0" as a statement.
> 	(_FPU_SETCW): Define to (void) (cw), rather than doing nothing
> 	with cw.
> 
> This change matches Joseph's recent MIPS-specific change to
> ports/sysdeps/mips/fpu_control.h.  It seems that tile (and maybe ia64)
> are the only ports that use the sysdeps/generic header.
> 
> This change removes a warning from math/setfpucw.c.  The generated
> function is still a no-op since the compiler ignores the assignment
> to a variable that isn't used.
> 
> OK to commit to main for 2.17?

This is ok.