external/liblangtag: Avoid null pointer deref in lt_warning call

Recent GCC 10 trunk warns (when LO is configured with --enable-optimized):

> In file included from lt-script-db.c:24:
> lt-script-db.c: In function ‘lt_script_db_parse.constprop’:
> lt-messages.h:105:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=]
>   105 |  lt_message_printf(LT_MSG_WARNING, \
>       |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   106 |      LT_MSG_FLAG_NONE, \
>       |      ~~~~~~~~~~~~~~~~~~~
>   107 |      0,   \
>       |      ~~~~~~
>   108 |      __VA_ARGS__)
>       |      ~~~~~~~~~~~~
> lt-script-db.c:137:4: note: in expansion of macro ‘lt_warning’
>   137 |    lt_warning("No subtag node: description = '%s'",
>       |    ^~~~~~~~~~
> lt-script-db.c:137:47: note: format string is defined here
>   137 |    lt_warning("No subtag node: description = '%s'",
>       |                                               ^~

Change-Id: I2924f7aab84f4f2640f277ee5c2689753627ae78
Reviewed-on: https://gerrit.libreoffice.org/83869
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
(cherry picked from commit 047e8ae5d189f030d565b13f97a4d6a45b00e6be)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/105557
Tested-by: Michael Stahl <michael.stahl@cib.de>
Reviewed-by: Michael Stahl <michael.stahl@cib.de>

0 files changed, 0 insertions, 0 deletions