-/* Update game log by appending "text", or by appending a "." if "text" is the
- * same as the last one passed.
+/* Returns message: "Trouble in ".parent." with ".child."." (try_*() helper) */
+extern char * trouble_msg(char * parent, char * child);
+
+/* Wrappers to malloc(), calloc() from function called "f" calling exit_err()
+ * with trouble_msg() error message if necessary.