[IDATag] Fix crash with context menu on offsets not in a func

idatag-fix-not-in-func-crash.patch

diff --git a/src/hooks_disas.cpp b/src/hooks_disas.cpp
index 38ad8d0..57b3470 100644
--- a/src/hooks_disas.cpp
+++ b/src/hooks_disas.cpp
@@ -108,11 +108,12 @@ action_state_t idaapi show_context_menu_disas_ah_t::update(action_update_ctx_t *
 int idaapi show_context_menu_disas_func_ah_t::activate(action_activation_ctx_t *ctx)
 {
        Idatag_context_disas_func* context_menu = new Idatag_context_disas_func(ctx);
-       if (myModel->is_in_func(ctx->cur_ea))
+       if (myModel->is_in_func(ctx->cur_ea) != BADADDR)
        {
                context_menu->show();
        }
        else {
                msg("\n[IDATag] Offset not in function. Aborted.");
        }
        return 0;
@@ -310,7 +311,7 @@ void evt_view_loc_changed_h(Idatag_hook_cview& myHook_CView, va_list args)
                }

                ea_t func = myModel->is_in_func(curea);
-               if (func)
+               if (func != BADADDR)
                {
                        Offset* offset_func = myModel->get_offset(func);
                        if (offset_func != NULL)
diff --git a/src/model.cpp b/src/model.cpp
index 9f8d577..0b528b4 100644
--- a/src/model.cpp
+++ b/src/model.cpp
@@ -435,7 +435,7 @@ ea_t Idatag_model::is_in_func(ea_t ea) const
        func_t* func;
        func = get_func(ea);

-       if (func == NULL) return -1;
+       if (func == NULL) return BADADDR;

        return func->start_ea;
 }