Fix T79119: Hook modifier deformation not shown in edit mode.

Missing temp `BKE_mesh_wrapper_ensure_mdata` hack for the Hook
modifier...

source/blender/modifiers/intern/MOD_hook.c

@@ -40,6 +40,7 @@
 #include "BKE_lib_id.h"
 #include "BKE_lib_query.h"
 #include "BKE_mesh.h"
+#include "BKE_mesh_wrapper.h"
 #include "BKE_modifier.h"
 #include "BKE_screen.h"
 
@@ -394,6 +395,11 @@ static void deformVertsEM(struct ModifierData *md,
   Mesh *mesh_src = MOD_deform_mesh_eval_get(
       ctx->object, editData, mesh, NULL, numVerts, false, false);
 
+  /* TODO(Campbell): use edit-mode data only (remove this line). */
+  if (mesh_src != NULL) {
+    BKE_mesh_wrapper_ensure_mdata(mesh_src);
+  }
+
   deformVerts_do(hmd, ctx, ctx->object, mesh_src, vertexCos, numVerts);
 
   if (!ELEM(mesh_src, NULL, mesh)) {