patch 7.4.1120

Problem:    delete(x, 'rf') fails if a directory is empty. (Lcd)
Solution:   Ignore not finding matches in an empty directory.

src/vim.h

@@ -836,6 +836,7 @@ extern char *(*dyn_libintl_textdomain)(const char *domainname);
 #define EW_SHELLCMD	0x2000	/* called from expand_shellcmd(), don't check
 				 * if executable is in $PATH */
 #define EW_DODOT	0x4000	/* also files starting with a dot */
+#define EW_EMPTYOK	0x8000	/* no matches is not an error */
 
 /* Flags for find_file_*() functions. */
 #define FINDFILE_FILE	0	/* only files */