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 374783c3

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;