Make strbuild_append_string return a status code

Author: BatchDrake

src/include/sigutils/util/util.h

@@ -190,7 +190,7 @@ void errno_save(void);
 void errno_restore(void);
 
 struct strlist *strlist_new(void);
-void strlist_append_string(struct strlist *, const char *);
+int strlist_append_string(struct strlist *, const char *);
 void strlist_walk(struct strlist *, void *, void (*)(const char *, void *));
 void strlist_destroy(struct strlist *);
 void strlist_debug(const struct strlist *);

src/util/util.c

@@ -325,10 +325,10 @@ strlist_new(void)
   return new;
 }
 
-void
+int
 strlist_append_string(struct strlist *list, const char *string)
 {
-  ptr_list_append(
+  return ptr_list_append_check(
       (void ***)&list->strings_list,
       &list->strings_count,
       xstrdup(string));