Making all in zbxprometheus
zbxprometheus.c: In function ‘zbx_prometheus_pattern’:
zbxprometheus.c:1535:34: warning: ‘label’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   *value = zbx_strdup(NULL, label->value);
                                  ^~
zbxprometheus.c:1520:27: note: ‘label’ was declared here
   zbx_prometheus_label_t *label;
                           ^~~~~