MDEV-28152 fix UBSAN error

sql_sequence.h:233:19: runtime error: signed integer overflow: -9223372036854775808 + -1 cannot be represented in type 'long long int'

followup for 374783c

sql/sql_sequence.h

@@ -230,7 +230,7 @@ class SEQUENCE :public sequence_definition
  }
  else
  {
- if (value + increment < min_value || value < min_value - increment)
+ if (value <= min_value || value + increment < min_value)
  value= min_value - 1;
  else
  value+= increment;