Sybren A. Stüvel
12ceea0434
A mouse click in the window will trigger the `VIEW3D_OT_cursor3d` operator before the viewport is available. This causes a segfault in `GPU_viewport_engines_data_validate()`. Other callers of `WM_draw_region_get_viewport()` already check for `NULL` being returned and handle it gracefully. Reviewed By: jbakker, fclem Differential Revision: https://developer.blender.org/D5216