Fixes the following warning:
In file included from ../../../imports/x11/include/X11/Xutil.h:54,
from ../../../imports/x11/include/X11/Intrinsic.h:54,
from Action.c:64:
../../../imports/x11/include/X11/keysym.h:49:1: warning: "XK_MISCELLANY" redefined
<command-line>: warning: this is the location of the previous definition
<keysym.h> which includes all key symbols and loads <keysymdef.h>
is automaticlly included by the X Toolkit.
This patch removes #include <keysymdef.h> whenever not needed,
and adds #define XK_MISCALLANY in the source code where required.
