*: convert amenable fdopen calls to take_fdopen

Mechanical change to eliminate some cruft by using the
new take_fdopen{_unlocked}() wrappers where trivial.

src/machine/machine-dbus.c

@@ -20,6 +20,7 @@
 #include "env-file.h"
 #include "env-util.h"
 #include "fd-util.h"
+#include "fileio.h"
 #include "format-util.h"
 #include "fs-util.h"
 #include "in-addr-util.h"
@@ -399,12 +400,10 @@ int bus_machine_method_get_os_release(sd_bus_message *message, void *userdata, s
 
                 pair[1] = safe_close(pair[1]);
 
-                f = fdopen(pair[0], "r");
+                f = take_fdopen(&pair[0], "r");
                 if (!f)
                         return -errno;
 
-                pair[0] = -1;
-
                 r = load_env_file_pairs(f, "/etc/os-release", &l);
                 if (r < 0)
                         return r;

src/machine/machined-dbus.c

@@ -620,12 +620,10 @@ static int clean_pool_done(Operation *operation, int ret, sd_bus_error *error) {
         if (lseek(operation->extra_fd, 0, SEEK_SET) == (off_t) -1)
                 return -errno;
 
-        f = fdopen(operation->extra_fd, "r");
+        f = take_fdopen(&operation->extra_fd, "r");
         if (!f)
                 return -errno;
 
-        operation->extra_fd = -1;
-
         /* The resulting temporary file starts with a boolean value that indicates success or not. */
         errno = 0;
         n = fread(&success, 1, sizeof(success), f);