block "user" client resizes during comp client updating phase

resizing objects triggers clip resizes and further event feeding which
can propagate mouse events such that clients try to resize themselves
during the update phase, resulting in illegal compositor behavior

src/bin/e_client.c

@@ -988,6 +988,7 @@ _e_client_resize_handle(E_Client *ec)
    int tw, th;
    Eina_List *skiplist = NULL;
 
+   if (e_comp->updating) return;
    x = ec->x;
    y = ec->y;
    w = ec->w;

src/bin/e_comp.c

@@ -376,6 +376,7 @@ _e_comp_cb_update(void)
         if (e_comp->grab_cb) e_comp->grab_cb();
         e_comp->grabbed = 1;
      }
+   e_comp->updating = 1;
    l = e_comp->updates;
    e_comp->updates = NULL;
    EINA_LIST_FREE(l, ec)
@@ -384,6 +385,7 @@ _e_comp_cb_update(void)
         e_comp_object_render_update_del(ec->frame);
         _e_comp_client_update(ec);
      }
+   e_comp->updating = 0;
    _e_comp_fps_update();
    if (conf->fps_show)
      {

src/bin/e_comp.h

@@ -170,6 +170,7 @@ struct _E_Comp
    Eina_Bool       shape_queue_blocked : 1; //x11 input shape updates are blocked
 
    Eina_Bool       rendering : 1; // we've received a pre-render callback but no post-render yet.
+   Eina_Bool       updating : 1; // running client updates
 };