[PATCH] hw/ppc/ppc405_boards: Initialize g_autofree pointer

[Bernhard Beschow]

Resolves the only compiler warning when building a full QEMU under Arch Linux:

  Compiling C object libqemu-ppc-softmmu.fa.p/hw_ppc_ppc405_boards.c.o
  In file included from /usr/include/glib-2.0/glib.h:114,
                   from qemu/include/glib-compat.h:32,
                   from qemu/include/qemu/osdep.h:132,
                   from ../src/hw/ppc/ppc405_boards.c:25:
  ../src/hw/ppc/ppc405_boards.c: In function ‘ref405ep_init’:
  /usr/include/glib-2.0/glib/glib-autocleanups.h:28:3: warning: ‘filename’ may 
be used uninitialized in this function [-Wmaybe-uninitialized]
     28 |   g_free (*pp);
        |   ^~~~~~~~~~~~
  ../src/hw/ppc/ppc405_boards.c:265:26: note: ‘filename’ was declared here
    265 |         g_autofree char *filename;
        |                          ^~~~~~~~

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
---
 hw/ppc/ppc405_boards.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index 7e1a4ac955..326353ea25 100644
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -262,7 +262,7 @@ static void ref405ep_init(MachineState *machine)
     /* allocate and load BIOS */
     if (machine->firmware) {
         MemoryRegion *bios = g_new(MemoryRegion, 1);
-        g_autofree char *filename;
+        g_autofree char *filename = NULL;
         long bios_size;
 
         memory_region_init_rom(bios, NULL, "ef405ep.bios", BIOS_SIZE,
-- 
2.35.1