[Bf-blender-cvs] [82e719ff876] master: Fix T64998: Multi window spin tool crash

[Campbell Barton]

Commit: 82e719ff8764da6c48ba3de4e5c11226953002e8
Author: Campbell Barton
Date:   Fri Aug 16 21:25:48 2019 +1000
Branches: master
https://developer.blender.org/rB82e719ff8764da6c48ba3de4e5c11226953002e8

Fix T64998: Multi window spin tool crash

There could be a more direct way to initialize a gizmo in a view,
for now this resolves the crash.

===================================================================

M	source/blender/editors/mesh/editmesh_extrude_spin_gizmo.c

===================================================================

diff --git a/source/blender/editors/mesh/editmesh_extrude_spin_gizmo.c b/source/blender/editors/mesh/editmesh_extrude_spin_gizmo.c
index 74700e59e99..7155348fed5 100644
--- a/source/blender/editors/mesh/editmesh_extrude_spin_gizmo.c
+++ b/source/blender/editors/mesh/editmesh_extrude_spin_gizmo.c
@@ -1008,8 +1008,17 @@ static void gizmo_mesh_spin_redo_setup(const bContext *C, wmGizmoGroup *gzgroup)
                                       });
   }
 
-  /* Become modal as soon as it's started. */
-  gizmo_mesh_spin_redo_modal_from_setup(C, gzgroup);
+  wmWindow *win = CTX_wm_window(C);
+  if (win && win->active) {
+    bScreen *screen = WM_window_get_active_screen(win);
+    if (screen->active_region) {
+      ARegion *ar = CTX_wm_region(C);
+      if (screen->active_region == ar) {
+        /* Become modal as soon as it's started. */
+        gizmo_mesh_spin_redo_modal_from_setup(C, gzgroup);
+      }
+    }
+  }
 }
 
 static void gizmo_mesh_spin_redo_draw_prepare(const bContext *UNUSED(C), wmGizmoGroup *gzgroup)