Silence false positive from Coverity Scan

51static int is_dir_empty(const char *path)
    52{
	 1. var_decl: Declaring variable namelist without initializer.
    53        struct dirent **namelist;
    54        int num;
    55

   CID 898746: (#1 of 1): Uninitialized pointer read (UNINIT)
   2. uninit_use_in_call: Using uninitialized value namelist when calling scandir.
    56        num = scandir(path, &namelist, NULL, NULL);
    57        if (num < 0)
    58                return 0;

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/tmpfiles.c

@@ -50,7 +50,7 @@ int r_flag = 0;
 
 static int is_dir_empty(const char *path)
 {
-	struct dirent **namelist;
+	struct dirent **namelist = NULL;
 	int num;
 
 	num = scandir(path, &namelist, NULL, NULL);