rdp-backend: unify creation of pixman_renderer_output
As pointed by Daniel Stone in #372 (closed), creation of pixman renderer outputs in the rdp backend were inconsistant regarding use_shadow.
Fixes: #372 (closed)
Edited by Pekka Paalanen
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As pointed by Daniel Stone in #372 (closed), creation of pixman renderer outputs in the rdp backend were inconsistant regarding use_shadow.
Fixes: #372 (closed)