hw/avr/boot: Fix memory leak in avr_load_firmware()

The value returned by qemu_find_file() must be freed.

This fixes Coverity issue CID 1430449, which points out
that the memory returned by qemu_find_file() is leaked.

Fixes: Coverity CID 1430449 (RESOURCE_LEAK)
Fixes: 7dd8f6f ('hw/avr: Add support for loading ELF/raw binaries')
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Michael Rolnik <[email protected]>
Tested-by: Michael Rolnik <[email protected]>
Reviewed-by: Daniel P. Berrangé <[email protected]>
Message-Id: <[email protected]>

Author: philmd

hw/avr/boot.c

@@ -60,7 +60,7 @@ static const char *avr_elf_e_flags_to_cpu_type(uint32_t flags)
 bool avr_load_firmware(AVRCPU *cpu, MachineState *ms,
                        MemoryRegion *program_mr, const char *firmware)
 {
-    const char *filename;
+    g_autofree char *filename = NULL;
     int bytes_loaded;
     uint64_t entry;
     uint32_t e_flags;