lineedit: fix to tab completion of applet override

When the ability to override an applet if an external binary was
present was added, the commit message for bd7018350 said:

   This doesn't affect tab completion in the shell:  whether a
   completion is an applet or an external command is irrelevant.

This isn't quite true.  Suppose 'applet' has been overridden in
such circumstances:

   $ export BB_OVERRIDE_APPLETS=";applet"
   $ applet

If the user now enters tab twice the output would be:

   applet     applet.exe

The applet is still treated as a potential match.  Recent changes
to the applet override code result in a simple fix:  the shell PATH
can be passed to is_applet_preferred() in the line editing code.
Now only 'applet.exe' is treated as a match.

Adds 16-32 bytes.

1 files changed, 3 insertions, 1 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 58ac68c22..efc5f8805 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -974,9 +974,11 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
         if (type == FIND_EXE_ONLY && !dirbuf) {
 # if ENABLE_FEATURE_SH_STANDALONE && NUM_APPLETS != 1
                 const char *p = applet_names;
+                const char *shpath = state->flags & WITH_PATH_LOOKUP ?
+                                                                state->path_lookup : NULL;
                 while (*p) {
                         if (strncmp(basecmd, p, baselen) == 0 &&
-                                        is_applet_preferred(p, NULL))
+                                        is_applet_preferred(p, shpath))
                                 add_match(xstrdup(p), TRUE);
                         while (*p++ != '\0')
                                 continue;