set_cmnd_path: apply runchroot if set when finding the command path

Previously we would prepend runchroot to the path we were checking
but that does not properly handle symbolic links.

plugins/sudoers/editor.c

@@ -147,7 +147,7 @@ resolve_editor(const char *ed, size_t edlen, int nfiles, char * const *files,
 	goto oom;
 
     /* If we can't find the editor in the user's PATH, give up. */
-    if (find_path(editor, &editor_path, &user_editor_sb, getenv("PATH"), NULL,
+    if (find_path(editor, &editor_path, &user_editor_sb, getenv("PATH"),
 	    0, allowlist) != FOUND) {
 	errno = ENOENT;
 	goto bad;