- char *beg_var, *end_var; /* variable name boundary */
- char *beg_subst, *end_subst = NULL; /* where value should be written to */
- char *value, *default_value = NULL;
+ char *beg_var;
+ char *end_var; /* variable name boundary */
+ char *beg_subst = end;
+ char *end_subst = NULL; /* where value should be written to */
+ char *value;
+ char *default_value = NULL;