basic/string-util: make ellipsize() inline

Once the redundant check is removed, it's a very simple wrapper around
ellipsize_mem().

src/basic/string-util.h

@@ -156,7 +156,10 @@ static inline bool _pure_ in_charset(const char *s, const char* charset) {
 bool string_has_cc(const char *p, const char *ok) _pure_;
 
 char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
-char *ellipsize(const char *s, size_t length, unsigned percent);
+static inline char *ellipsize(const char *s, size_t length, unsigned percent) {
+        return ellipsize_mem(s, strlen(s), length, percent);
+}
+
 char *cellescape(char *buf, size_t len, const char *s);
 
 /* This limit is arbitrary, enough to give some idea what the string contains */