found by cppcheck
[client/Windows/wf_cliprdr.c:2556] -> [client/Windows/wf_cliprdr.c:2561]: (warning) Identical condition '!clipboard', second condition is always false
[client/X11/xf_floatbar.c:800] -> [client/X11/xf_floatbar.c:796]: (warning) Either the condition '!floatbar' is redundant or there is possible null pointer dereference: floatbar.
[client/X11/xf_floatbar.c:800] -> [client/X11/xf_floatbar.c:797]: (warning) Either the condition '!floatbar' is redundant or there is possible null pointer dereference: floatbar.
[client/X11/xf_floatbar.c:800] -> [client/X11/xf_floatbar.c:798]: (warning) Either the condition '!floatbar' is redundant or there is possible null pointer dereference: floatbar.
[libfreerdp/codec/dsp.c:1156] -> [libfreerdp/codec/dsp.c:1154]: (warning) Either the condition '!srcFormat' is redundant or there is possible null pointer dereference: srcFormat.
[channels/drdynvc/client/drdynvc_main.c:1453] -> [channels/drdynvc/client/drdynvc_main.c:1450]: (warning) Either the condition '!drdynvc' is redundant or there is possible null pointer dereference: drdynvc.
[channels/audin/client/opensles/audin_opensl_es.c:98] -> [channels/audin/client/opensles/audin_opensl_es.c:94]: (warning) Either the condition '!opensles' is redundant or there is possible null pointer dereference: opensles.
[channels/audin/client/opensles/audin_opensl_es.c:159] -> [channels/audin/client/opensles/audin_opensl_es.c:153]: (warning) Either the condition '!opensles' is redundant or there is possible null pointer dereference: opensles.
Up until now X11 mouse button remapping was only possible for the
default buttons 1 to 3.
With this pull any X11 mouse button can be mapped to any RDP mouse
event and all X11 remappings are respected.
The cause is very simple: we didn't map the xwindow on receiving
WINDOW_SHOW. but doing that causes another problem that you can't
hide a window anymore, and that is because whlie window hiding, the
_NET_WM_STATE and WM_STATE properies of the xwindow may change, in
the function `xf_event_PropertyNotify` we just assume that windows
not maximized, not minimized, yet not showing normally should be
corrected to be shown, we just need to consider the situation that
the window is hidden here.
fix: #5078
