separate _NET atoms at the end of the array

So when setting the list of supported _NET atoms, we can just pass a
pointer to ATOM[_NET_SUPPORTED] as the beginning of the array of
supported atoms, and NATOMS - _NET_SUPPORTED as its length.

icc.c

@@ -40,10 +40,7 @@ void init_atoms()
 void setsupports(Window root, Window checkwin)
 {
   XChangeProperty(dpy, root, ATOMS[_NET_SUPPORTED], XA_ATOM, 32,
-    PropModeReplace, (void *)(Atom[]){
-      ATOMS[_NET_WM_STATE],
-      ATOMS[_NET_WM_STATE_FULLSCREEN],
-    }, 2);
+    PropModeReplace, (void *)&ATOMS[_NET_SUPPORTED], NATOMS-_NET_SUPPORTED);
   XChangeProperty(dpy, root, ATOMS[_NET_SUPPORTING_WM_CHECK], XA_WINDOW, 32,
     PropModeReplace, (void *)(Window[]){checkwin}, 1);
   XChangeProperty(dpy, checkwin, ATOMS[_NET_SUPPORTING_WM_CHECK], XA_WINDOW, 32,

icc.h

@@ -31,7 +31,14 @@ extern Window get_transient_for(Window);
   .data.l = {(long)(x), CurrentTime, __VA_ARGS__}, \
 }})
 
+#define NET_ATOMS \
+  X(_NET_SUPPORTING_WM_CHECK) \
+  X(_NET_WM_NAME) \
+  X(_NET_WM_STATE) \
+  X(_NET_WM_STATE_FULLSCREEN) \
+
 #define ATOMS_TABLE(X) \
+  X(__SWM_VROOT) \
   X(AMIWM_APPICONMSG) \
   X(AMIWM_APPWINDOWMSG) \
   X(AMIWM_SCREEN) \
@@ -45,11 +52,7 @@ extern Window get_transient_for(Window);
   X(WM_STATE) \
   X(WM_TAKE_FOCUS) \
   X(_NET_SUPPORTED) \
-  X(_NET_SUPPORTING_WM_CHECK) \
-  X(_NET_WM_NAME) \
-  X(_NET_WM_STATE) \
-  X(_NET_WM_STATE_FULLSCREEN) \
-  X(__SWM_VROOT)
+  NET_ATOMS     /* this must come last */
 
 enum {
 #define X(atom) atom,