emulators/virtualbox-ose-additions: build failure on 15.0-CURRENT 1500003

From: Graham Perrin <grahamperrin_at_gmail.com>
Date: Wed, 08 Nov 2023 02:13:30 UTC
The currently provided package causes a kernel panic.

Build from source fails.

kmk: *** No rule to make target `/usr/src/sys/kern/bus_if.m', needed by 
`/usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-6.1.48/out/freebsd.amd64/release/obj/FreeBSDGeneratedKernelHeaders/bus_if.h'.Stop.
kmk:***Waiting for unfinished jobs....
In file included from 
/usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-6.1.48/src/VBox/Runtime/common/dbg/dbgstackdumpself.cpp:39:
/usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-6.1.48/include/iprt/path.h:787:7: 
warning: flexible array members are a C99 feature 
[-Wc99-extensions]
}aComps[RT_FLEXIBLE_ARRAY];
 ^
/usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-6.1.48/include/iprt/path.h:874:17: 
warning: flexible array members are a C99 feature 
[-Wc99-extensions]
char *apszComps[RT_FLEXIBLE_ARRAY];
 ^
2warnings generated.
2warnings generated.
kmk:***Exiting with status 2
***Error code 2
Stop.
make[1]:stopped in /usr/ports/emulators/virtualbox-ose-additions
***Error code 1
Stop.
make:stopped in /usr/ports/emulators/virtualbox-ose-additions
root@mowa219-gjp4-freebsd-15-vm:/usr/ports/emulators/virtualbox-ose-additions# 
exit