libbb: remove is_directory's argument which is always NULL

function                                             old     new   delta
send_cgi_and_exit                                    892     890      -2
ln_main                                              447     445      -2
handle_incoming_and_exit                            2784    2780      -4
is_directory                                          66      59      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/6 up/down: 2/-19)             Total: -15 bytes

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

1 files changed, 5 insertions, 10 deletions

diff --git a/libbb/isdirectory.c b/libbb/isdirectory.c
index 9861be6f8..ba6c52ce8 100644
--- a/libbb/isdirectory.c
+++ b/libbb/isdirectory.c
@@ -15,22 +15,17 @@
  * Return TRUE if fileName is a directory.
  * Nonexistent files return FALSE.
  */
-int FAST_FUNC is_directory(const char *fileName, int followLinks, struct stat *statBuf)
+int FAST_FUNC is_directory(const char *fileName, int followLinks)
 {
 	int status;
-	struct stat astatBuf;
-
-	if (statBuf == NULL) {
-		/* use auto stack buffer */
-		statBuf = &astatBuf;
-	}
+	struct stat statBuf;
 
 	if (followLinks)
-		status = stat(fileName, statBuf);
+		status = stat(fileName, &statBuf);
 	else
-		status = lstat(fileName, statBuf);
+		status = lstat(fileName, &statBuf);
 
-	status = (status == 0 && S_ISDIR(statBuf->st_mode));
+	status = (status == 0 && S_ISDIR(statBuf.st_mode));
 
 	return status;
 }