libbb: introduce and use xasprintf_inplace()

function                                             old     new   delta
xasprintf_and_free                                     -      49     +49
watch_main                                           269     282     +13
singlemount                                         1313    1315      +2
append_mount_options                                 157     149      -8
ip_port_str                                          122     112     -10
lsblk_main                                           869     858     -11
add_cmd                                             1178    1167     -11
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/4 up/down: 64/-40)             Total: 24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index 31a215a29..b3c0768ee 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -1010,9 +1010,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
                 char **arg = argv;
                 while (*++arg) {
                         /* Enclose options in quotes */
-                        char *s = options;
-                        options = xasprintf("%s \"%s\"", s ? s : "", *arg);
-                        free(s);
+                        xasprintf_inplace(options, "%s \"%s\"", options ? options : "", *arg);
                         *arg = NULL;
                 }
 # else