[PATCH] Win32: Fix building with NO_UNIX_SOCKETS

After 2406bf5fc5 it fails with:

compat/mingw.c:4160:5: error: no previous prototype for function 'mingw_have_unix_sockets' [-Werror,-Wmissing-prototypes]
   4160 | int mingw_have_unix_sockets(void)
        |     ^

because the prototype is behind `ifndef NO_UNIX_SOCKETS`

Signed-off-by: Mike Hommey <redacted>
---
 compat/mingw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compat/mingw.c b/compat/mingw.c
index 4876344b5b..6b06ea540f 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c

@@ -3159,6 +3159,7 @@ int uname(struct utsname *buf)
 	return 0;
 }
 
+#ifndef NO_UNIX_SOCKETS
 int mingw_have_unix_sockets(void)
 {
 	SC_HANDLE scm, srvc;

@@ -3177,3 +3178,4 @@ int mingw_have_unix_sockets(void)
 	}
 	return ret;
 }
+#endif

-- 
2.45.0.1.ge6f3e402ce