change interface to bb_xasprintf() - more perfect for me.
ln.c: error_msg(str)->error_msg(%s, str) - remove standart "feature" for hackers
reduce 100 bytes don't care in sum
diff --git a/libbb/concat_path_file.c b/libbb/concat_path_file.c
index 00233ad..029c232 100644
--- a/libbb/concat_path_file.c
+++ b/libbb/concat_path_file.c
@@ -30,7 +30,6 @@
 
 extern char *concat_path_file(const char *path, const char *filename)
 {
-	char *outbuf;
 	char *lc;
 
 	if (!path)
@@ -38,7 +37,5 @@
 	lc = last_char_is(path, '/');
 	while (*filename == '/')
 		filename++;
-	bb_xasprintf(&outbuf, "%s%s%s", path, (lc==NULL ? "/" : ""), filename);
-
-	return outbuf;
+	return bb_xasprintf("%s%s%s", path, (lc==NULL ? "/" : ""), filename);
 }