Try to fix macos build for tablespaces

Author: Alexander Zhdanov

src/jrd/os/posix/unix.cpp

@@ -1196,6 +1196,17 @@ static SLONG pwrite(int fd, SCHAR* buf, SLONG nbytes, SLONG offset)
 #endif // !(HAVE_PREAD && HAVE_PWRITE)
 
 
+bool PIO_file_exists(const Firebird::PathName& fileName)
+{
+	const int fd = openFile(fileName.c_str(), false, false, true);
+	if (fd == -1)
+		return false;
+
+	close(fd);
+	return true;
+}
+
+
 #ifdef SUPPORT_RAW_DEVICES
 int PIO_unlink(const PathName& file_name)
 {
@@ -1235,17 +1246,6 @@ bool PIO_on_raw_device(const PathName& file_name)
 }
 
 
-bool PIO_file_exists(const Firebird::PathName& fileName)
-{
-	const int fd = openFile(fileName.c_str(), false, false, true);
-	if (fd == -1)
-		return false;
-
-	close(fd);
-	return true;
-}
-
-
 static bool raw_devices_validate_database(int desc, const PathName& file_name)
 {
 /**************************************