exposay: remove redundant NULL check in highlight_surface

exposay_highlight_surface() is called from exposay_pick(),
exposay_layout(), and exposay_maybe_move() where the esurface
parameter is already validated prior to the call.  This makes
the 'esurface' NULL check redundant.  This assumes any future
calls to exposay_highlight_surface() will also validate the
'esurface' parameter prior to the call.

This fixes the logic in exposay_highlight_surface so static
analyzers don't complain about the possibility that 'view'
might be NULL deref'd when a 'esurface' == NULL condition is
true.

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>

desktop-shell/exposay.c

@@ -136,13 +136,10 @@ static void
 exposay_highlight_surface(struct desktop_shell *shell,
                           struct exposay_surface *esurface)
 {
-	struct weston_view *view = NULL;
+	struct weston_view *view = esurface->view;
 
-	if (esurface) {
-		shell->exposay.row_current = esurface->row;
-		shell->exposay.column_current = esurface->column;
-		view = esurface->view;
-	}
+	shell->exposay.row_current = esurface->row;
+	shell->exposay.column_current = esurface->column;
 
 	activate(shell, view->surface, shell->exposay.seat);
 	shell->exposay.focus_current = view;