make it more or less work with 'warning_level=everything'

include/utils.h

@@ -19,7 +19,7 @@
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define P_BYTES(bytes, start) pretty_bytes((bytes), (start), (char[16]){0}, 16)
-#define P_NUM(num) pretty_num((num), (char[8]){0}, 8)
+#define P_NUM(num) pretty_num((num), (char[16]){0}, 16)
 
 int get_instance_lock(void);