[Xcb] c_client.py: enumerator values generation

[Litvinenko, Evgeny]

Hi.

I've tried to build libxcb-1.12 (with gcc option -pedantic-errors)
and got the following error:

In file included from xinput.c:14:0:
xinput.h:3079:35: error: ISO C restricts enumerator values to range of 'int' [-Wpedantic]
     XCB_INPUT_MODIFIER_MASK_ANY = 2147483648

The file xinput.h is generated during build by python script 'c_client.py'
(https://cgit.freedesktop.org/xcb/libxcb/tree/src/c_client.py)
as follows:

/usr/bin/python ./c_client.py   -c "libxcb 1.12" -l "X Version 11" \
        -s "3" -p /usr/lib/python2.7/site-packages \
         \
        /usr/share/xcb/xinput.xml

The resulted file xinput.h contains the structure that gives the error:

    typedef enum xcb_input_modifier_mask_t {
        XCB_INPUT_MODIFIER_MASK_ANY = 2147483648
    } xcb_input_modifier_mask_t;

The structure is generated based on the followin code in xcb/proto/src/xinput.xml
(https://cgit.freedesktop.org/xcb/proto/tree/src/xinput.xml)

    <enum name="ModifierMask">
        <item name="Any"> <bit>31</bit> </item>
    </enum>

Is it correct that xinput.h has number 2147483648 (which is 32bit long)
where as we have '<bit>31</bit>' in xinput.xml?

Thanks,
Evgeny.

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