[libinput] Problem with meson configure

[Peter Hutterer]

On Mon, Jul 03, 2017 at 10:20:13AM -0400, Marty Jack wrote:
> 
> With -Dlibwacom=false, an error occurs.  It looks like it is because the definition is inside "if have_libwacom".
> I'd suggest a fix, but I have no experience with meson to know what the best style would be.
> 
> meson --prefix=/usr --buildtype=release ../libinput-1.8.0 --libexecdir=/usr/lib \
> -Ddebug-gui=false \
> -Ddocumentation=false \
> -Dlibwacom=false
> ...
> Meson encountered an error in file meson.build, line 76, column 0:
> Unknown variable "dep_libwacom".
> make: *** [libinput-makefile:16: configure] Error 1

Thanks and sorry for not catching this earlier, my CI was/is still on
autotools. This was also reported here:
https://bugs.freedesktop.org/show_bug.cgi?id=101693

Fix is pushed as c6e0c96e74

Cheers,
   Peter