remove unnecessary GTK declarations from defs.h, move things only used once to the place that needs them

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69020 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/window.h

@@ -11,6 +11,10 @@
 #define __GTKWINDOWH__
 
 typedef struct _GtkTooltips GtkTooltips;
+#ifdef HAVE_XIM
+typedef struct _GdkIC GdkIC;
+typedef struct _GdkICAttr GdkICAttr;
+#endif
 
 // helper structure that holds class that holds GtkIMContext object and
 // some additional data needed for key events processing