fix bug: carrying capacity maximum should be a required configuration parameter

src/cats/vital_rates/default_vital_rates.c

@@ -195,6 +195,9 @@ void setup_carrying_capacity(struct cats_configuration *conf)
 {
         for (int32_t sp_idx = 0; sp_idx < conf->param_count; sp_idx++) {
                 struct cats_vital_rate *vr = &conf->param[sp_idx].carrying_capacity;
+                init_cats_vital_rate(vr);
+                vr->suitability_cutoff_hint = HYBRID_SUIT_TS_ZERO;
+                vr->suitability_cutoff = 0.0;
                 vr->is_carrying_capacity = true;
                 vr->default_rate_id = VR_UNSPECIFIED;
                 vr->is_integer_quantity = true;
@@ -202,6 +205,7 @@ void setup_carrying_capacity(struct cats_configuration *conf)
                 vr->upper_limit_excl = NAN;
                 vr->upper_limit_incl = NAN;
                 vr->lower_limit_incl = 1.0;
+                vr->max_rate = NAN;
                 vr->density = NO_DENSITY_DEP;
                 set_vital_rate_name(vr, "carrying capacity");
                 set_vital_rate_link_hybrid_function(vr, conf, LINK_SUITABILITY_SIGMOID);
@@ -241,7 +245,8 @@ void post_process_vital_rate(struct cats_configuration *conf, struct cats_vital_
                 switch (vr->suitability_cutoff_hint) {
                         case HYBRID_SUIT_TS_UNSPECIFIED:
                                 log_message(LOG_ERROR,
-                                            "%s: vital rate '%s' does not provide information about suitability cutoff");
+                                            "%s: vital rate '%s' does not provide information about suitability cutoff",
+                                            __func__, vr->name);
                                 exit_cats(EXIT_FAILURE);
                                 // break;
                         case HYBRID_SUIT_TS_ZT: