darwin-user: Use GCC_FMT_ATTR (format checking)

The redundant forward declaration of qerror in machload.c
is removed because it should be taken from qemu.h.

Please note that this patch is untested because
I have no matching environment to compile it.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

darwin-user/machload.c

@@ -82,7 +82,7 @@ void *macho_text_sect = 0;
 int   macho_offset = 0;
 
 int load_object(const char *filename, struct target_pt_regs * regs, void ** mh);
-void qerror(const char *format, ...);
+
 #ifdef TARGET_I386
 typedef struct mach_i386_thread_state {
     unsigned int    eax;

darwin-user/qemu.h

@@ -100,7 +100,7 @@ int do_sigaction(int sig, const struct sigaction *act,
 int do_sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
 
 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
-void qerror(const char *fmt, ...);
+void qerror(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 
 void write_dt(void *ptr, unsigned long addr, unsigned long limit, int flags);