Use 'long' instead of 'CARD32' in wClientSetState() and wWindowSaveState()

The rationale is the same as in commit c7f2a189c4
("Fix the call to XChangeProperty() in 64-bit mode"), because we are
calling XChangeProperty() with format 32, which requires the type of
'data' to be 'long'.

src/client.c

@@ -105,7 +105,7 @@ void wClientRestore(WWindow * wwin)
  */
 void wClientSetState(WWindow * wwin, int state, Window icon_win)
 {
-	CARD32 data[2];
+	long data[2];
 
 	wwin->state = state;