cocoa: Fix warnings about invalid prototype declarations

Fix the following Cocoa trivial warnings:

  C compiler for the host machine: cc (clang 14.0.0 "Apple clang version 14.0.0 (clang-1400.0.29.202)")
  Objective-C compiler for the host machine: clang (clang 14.0.0)

  [100/334] Compiling Objective-C object libcommon.fa.p/net_vmnet-bridged.m.o
  net/vmnet-bridged.m:40:31: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  static char* get_valid_ifnames()
                                ^
                                 void
  [742/1436] Compiling Objective-C object libcommon.fa.p/ui_cocoa.m.o
  ui/cocoa.m:1937:22: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  static int cocoa_main()
                       ^
                        void

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230425192820.34063-1-philmd@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui/cocoa.m b/ui/cocoa.m
index 168170a8a6..0c2153d17c 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -1934,7 +1934,7 @@ static void *call_qemu_main(void *opaque)
     exit(status);
 }
 
-static int cocoa_main()
+static int cocoa_main(void)
 {
     QemuThread thread;