fix: prevent multi-threaded server race conditions

include/error.h

@@ -162,6 +162,7 @@ typedef struct lm_error_desc {
 
 void       lm_error_set(lm_error_t code, ...);
 void       lm_error_clear();
+void       lm_error_init();
 lm_error_t lm_error();
 char      *lm_strerror();