rename _c_helper_absolute_name to _c_helper_fieldaccess_expr

rename _c_helper_absolute_name to _c_helper_fieldaccess_expr

The function _c_helper_absolute_name was named in
a misleading way.
It computes a C-expression for accessing a field of an xcb-type.

Therefore the name _c_helper_fieldaccess_expr is more appropriate.

Note: Patch 6 of this series has been removed during the review process.

Signed-off-by: Christian Linhart <chris@demorecorder.com>
Reviewed-by: Ran Benita <ran234@gmail.com>
Message-ID: <545627AE.2040200@DemoRecorder.com>
Patch-Thread-Subject: [Xcb] [PATCHSET] ListInputDevices revision 2
Patch-Set: ListInputDevices
Patch-Number: libxcb 7/9
Patch-Version: V1