mcabber: fix compilation with GCC15 by correcting function prototypes (#476382)

GCC 15 uses C23 by default which is stricter about function prototypes.

diff -r -U3 mcabber-1.1.2.orig/mcabber/screen.c mcabber-1.1.2/mcabber/screen.c

--- mcabber-1.1.2.orig/mcabber/screen.c	2026-01-02 22:48:11.169262178 +0100

+++ mcabber-1.1.2/mcabber/screen.c	2026-01-02 22:51:01.428023634 +0100

@@ -90,7 +90,7 @@

                            const gchar *message, gpointer user_data);

 #ifdef XEP0085

-static gboolean scr_chatstates_timeout();

+static gboolean scr_chatstates_timeout(gpointer user_data);

 #endif

 #if defined(WITH_ENCHANT) || defined(WITH_ASPELL)

@@ -2485,7 +2485,7 @@

 }

 #ifdef XEP0085

-static gboolean scr_chatstates_timeout(void)

+static gboolean scr_chatstates_timeout(gpointer user_data)

 {

   time_t now;

   time(&now);

diff -r -U3 mcabber-1.1.2.orig/mcabber/xmpp.c mcabber-1.1.2/mcabber/xmpp.c

--- mcabber-1.1.2.orig/mcabber/xmpp.c	2026-01-02 22:48:11.166975512 +0100

+++ mcabber-1.1.2/mcabber/xmpp.c	2026-01-02 22:52:30.355029495 +0100

@@ -50,7 +50,7 @@

 static guint AutoConnection;

 inline void update_last_use(void);

-inline gboolean xmpp_reconnect();

+inline gboolean xmpp_reconnect(gpointer user_data);

 enum imstatus mystatus = offline;

 static enum imstatus mywantedstatus = available;

@@ -781,7 +781,7 @@

     scr_LogPrint(LPRINT_LOGNORM, "Authentication failed");

 }

-gboolean xmpp_reconnect()

+gboolean xmpp_reconnect(gpointer user_data)

 {

   if (!lconnection)

     xmpp_connect();

      sha256 = "01bc23z0mva9l9jv587sq2r9w3diachgkmb9ad99hlzgj02fmq4v";

      stripLen = 1;

    })

    ./add-missing-arguments-to-function-prototypes.patch

  ];

  nativeBuildInputs = [ pkg-config ];