ProcRRGetScreenSizeRange uses REQUEST(xRRGetScreenSizeRangeReq) followed by
REQUEST_SIZE_MATCH(xRRGetScreenInfoReq).  This happens to work out because both
requests have the same size, so this is not a functional change, just a cosmetic
one.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

Backported from Arctica GH 3.6.x branch.

v2: backport to nx-libs 3.6.x (Ulrich Sibiller)
v3: backport to nx-libs 3.5.0.x (Mihai Moldovan)